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See detailPositiv desintegriert: Krise als Chance
Baudson, Tanja Gabriele UL

E-print/Working paper (2018)

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See detailDemographie und Migration: Anziehung versus Schrumpfung
Nienaber, Birte UL; Hamez, Grégory; Mangels, Kirsten

E-print/Working paper (2018)

This working paper includes analyses of demography and migration in the Greater region. It has a special view on cross-border mobility, ageing and health infrastructure in rural areas.

Detailed reference viewed: 113 (4 UL)
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See detailEffect of increasing the ramification on pseudo-deformation rings
Deo, Shaunak UL

E-print/Working paper (2018)

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See detailCorruption and tax compliance: Evidence from small retailers in Bamako, Mali
Bertinelli, Luisito UL; Bourgain, Arnaud UL; Leon, Florian UL

E-print/Working paper (2018)

We investigate the impact of corruption on tax compliance using a sample of 700 small business in Bamako, Mali. Our results show that paying bribes reduced tax compliance by almost ten percentage points.

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See detailLe découpage administratif de la Grande Région SaarLorLux
Helfer, Malte UL; Pauly, Michel UL; Caruso, Geoffrey UL et al

E-print/Working paper (2018)

The administrative division of the Greater Region (2008: 65,398 km², 11.4 million inhabitants) is not homogeneous. The different areas of the Grande Région have different statuses: The Grand Duchy of ... [more ▼]

The administrative division of the Greater Region (2008: 65,398 km², 11.4 million inhabitants) is not homogeneous. The different areas of the Grande Région have different statuses: The Grand Duchy of Luxembourg is a sovereign state, Wallonia is a region of Belgium, Lorraine was until the end of 2015 one of the 26 regions of France, is from 1.10.2016 part of the new region Grand Est, Rhineland-Palatinate and Saarland are German Länder. The size and number of inhabitants of the municipalities as well as their competences differ significantly from each other, not least because there has been no municipal reform in France, but also because of the different political and economic structures. [less ▲]

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See detailSojourn time dimensions of fractional Brownian motion
Nourdin, Ivan UL; Peccati, Giovanni UL; Seuret, Stéphane

E-print/Working paper (2018)

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See detailMono-to-multilayer transition in growing bacterial colonies
Sengupta, Anupam UL

E-print/Working paper (2018)

The transition from monolayers to multilayered structures in bacterial colonies is a fundamental step in biofilm development. Observed across different morphotypes and species, this transition is ... [more ▼]

The transition from monolayers to multilayered structures in bacterial colonies is a fundamental step in biofilm development. Observed across different morphotypes and species, this transition is triggered within freely growing bacterial microcolonies comprising a few hundred cells. Using a combination of numerical simulations and analytical modeling, here we demonstrate that this transition originates from the competition between growth-induced in-plane active stresses and vertical restoring forces, due to the cell-substrate interactions. Using a simple chain-like colony of laterally confined cells, we show that the transition is triggered by the mechanical instability of individual cells, thus it is localized and mechanically deterministic. Asynchronous cell division renders the process stochastic, so that all the critical parameters that control the onset of the transition are continuously distributed random variables. Upon modeling cell division as a Poisson process, we can approximately calculate the probability distribution function of the position and time associated with the first extrusion. The rate of such a Poisson process can be identified as the order parameter of the transition, thus highlighting its mixed deterministic/stochastic nature. [less ▲]

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See detailIncreasing taxes after a financial crisis: Not a bad idea after all
Koulovatianos, Christos UL; Mavridis, Dimitrios

E-print/Working paper (2018)

Based on OECD evidence, equity/housing-price busts and credit crunches are followed by substantial increases in public consumption. These increases in unproductive public spending lead to increases in ... [more ▼]

Based on OECD evidence, equity/housing-price busts and credit crunches are followed by substantial increases in public consumption. These increases in unproductive public spending lead to increases in distortionary marginal taxes, a policy in sharp contrast with presumably optimal Keynesian fiscal stimulus after a crisis. Here we claim that this seemingly adverse policy selection is optimal under rational learning about the frequency of rare capital-value busts. Bayesian updating after a bust implies massive belief jumps toward pessimism, with investors and policymakers believing that busts will be arriving more frequently in the future. Lowering taxes would be as if trying to kick a sick horse in order to stand up and run, since pessimistic markets would be unwilling to invest enough under any temporarily generous tax regime. [less ▲]

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See detailLocal curvature estimates for the Laplacian flow
Li, Yi UL

E-print/Working paper (2018)

Detailed reference viewed: 116 (8 UL)
See detailAre Capital Requirements on Small Business Loans Flawed?
Wolff, Christian UL; Bams, Dennis; Magdalena, Pisa

E-print/Working paper (2018)

Detailed reference viewed: 72 (0 UL)
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See detailKrichever-Novikov type algebras. Definitions and Results
Schlichenmaier, Martin UL

E-print/Working paper (2018)

Detailed reference viewed: 47 (0 UL)
See detailDra' Abu el-Naga, Ägypten. Untersuchungen zu Formation und Entwicklung einer oberägyptischen Residenznekropole. Die Arbeiten der Jahre 2017 und 2018
Polz, Daniel; Böhme, Isa; Michels, Susanne et al

E-print/Working paper (2018)

Detailed reference viewed: 33 (0 UL)
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See detailHealth and Pollution in a Vertically Differentiated Duopoly
Zanaj, Skerdilajda UL

E-print/Working paper (2018)

Detailed reference viewed: 113 (1 UL)
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Peer Reviewed
See detailPhase field simulation of early-age fracture in cement-based materials
Nguyen, Thanh Tung UL; Waldmann, Danièle UL; Bui, T. Q.

E-print/Working paper (2018)

Detailed reference viewed: 104 (14 UL)
See detailEntwicklungen der Trans*-Bewegung in der Bundesrepublik Deutschland
De Silva, Adrian UL

E-print/Working paper (2018)

Detailed reference viewed: 233 (36 UL)
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See detailLa production en céramique dans la Grande Région SaarLorLux
Decker, Emile; Helfer, Malte UL; Pauly, Michel UL et al

E-print/Working paper (2018)

Consisting of four entities, regions or states, located in the heart of Europe, the Greater Region SaarLorLux has long been considered a territory with a rich industrial past of great dynamism. Among the ... [more ▼]

Consisting of four entities, regions or states, located in the heart of Europe, the Greater Region SaarLorLux has long been considered a territory with a rich industrial past of great dynamism. Among the many branches of activity, there is one that has long been a flagship of its skills: ceramics. The term "ceramics" covers a certain number of very different products in terms of their appearance and properties, all made from fired clay. Over time, manufacturing techniques have evolved to produce less and less porous and finer designs. The applications of this material have thus expanded considerably. Working with clay is a long-standing tradition in this region, as the first ceramics discovered at archaeological sites are 7 000 years old. So, for thousands of years, potters made objects out of fired clay. [less ▲]

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See detailBig Moves of Mutual Funds
Lehnert, Thorsten UL

E-print/Working paper (2018)

Detailed reference viewed: 69 (2 UL)
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See detailExecuting Trades in Style: Retail Investors vs. Institutions
Wolff, Christian UL; Ekkayokkaya, Manapol

E-print/Working paper (2018)

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See detailTechnological Progress, the Supply ofHours Worked, and the Consumption-Leisure Complementarity
Irmen, Andreas UL

E-print/Working paper (2018)

At least since 1870 hours worked per worker declined and real wages increased in many of today’s industrialized countries. The dual nature of technological progress in conjunction with a consumption ... [more ▼]

At least since 1870 hours worked per worker declined and real wages increased in many of today’s industrialized countries. The dual nature of technological progress in conjunction with a consumption-leisure complementarity explains these stylized facts. Technological progress drives real wages up and expands the amount of available consumption goods. Enjoying consumption goods increases the value of leisure. Therefore, individuals demand more leisure and supply less labor. This mechanism appears in an OLG-model with two-period lived individuals equipped with per-period utility functions of the generalized log-log type proposed by Boppart-Krusell (2016). The optimal plan is piecewise defined and hinges on the wage level. Technological progress moves a poor economy out of a regime with low wages and an inelastic supply of hours worked into a regime where wages increase further and hours worked continuously decline. [less ▲]

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See detailMigrants internationaux et migration dans la Grande Région SaarLorLux
Nienaber, Birte UL; Roos, Ursula; Helfer, Malte UL et al

E-print/Working paper (2018)

With regard to demographic change and the decline in birth rates in some parts of the Greater Region SaarLorLux, migration has become increasingly significant in recent years. The population growth ... [more ▼]

With regard to demographic change and the decline in birth rates in some parts of the Greater Region SaarLorLux, migration has become increasingly significant in recent years. The population growth currently observed in the Greater Region is also primarily due to significant gains in migration. Between 1990 and 2006, net immigration to the Greater Region amounted to 558,500 persons, although migration influenced population development to varying degrees in the individual sub-regions. [less ▲]

Detailed reference viewed: 27 (5 UL)
See detailAccounting for Differences in Income Inequality across Countries: Ireland and the United Kingdom
Sologon, Denisa M.; Van Kerm, Philippe UL; Li, Jinjing et al

E-print/Working paper (2018)

This paper proposes a framework for studying international differences in the distribution of household income. Integrating micro-econometric and micro-simulation approaches in a decomposition analysis it ... [more ▼]

This paper proposes a framework for studying international differences in the distribution of household income. Integrating micro-econometric and micro-simulation approaches in a decomposition analysis it quantifies the role of tax-benefit systems, employment and occupational structures, labour prices and market returns, and demographic composition in accounting for differences in income inequality across countries. Building upon EUROMOD (the European tax-benefit calculator) and its harmonized datasets, the model is portable and can be implemented for any cross-country comparisons within the EU. An application to the UK and Ireland--two countries that have much in common while displaying different levels of inequality--shows that differences in tax-benefit rules between the two countries account for roughly half of the observed difference in disposable household income inequality. Demographic differences play negligible roles. The Irish tax-benefit system is more redistributive than UK's due to a higher tax progressivity and higher average transfer rates. These are largely attributable to policy parameter differences, but also to differences in pre-tax, pre-transfer income distributions. [less ▲]

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See detailHeterogeneity in Conformism, Firm Selection, and Home Bias
Picard, Pierre M UL; Kichko, Sergey

E-print/Working paper (2018)

This paper discusses the impact of conformism on product quality, firm selection, and trade patterns. It shows that when consumers have a higher degree of conformism and/or their distribution of ... [more ▼]

This paper discusses the impact of conformism on product quality, firm selection, and trade patterns. It shows that when consumers have a higher degree of conformism and/or their distribution of conformism becomes more concentrated, the equilibrium average demand falls while product quality rises in a closed economy. In an international trade context, this strengthens the home consumption bias when consumers conform to the behavior of local people. The home bias is mitigated under globalization where individuals tend to conform to people worldwide. The paper also discusses the conditions under which conformism and conspicuousness are reconciled. [less ▲]

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See detailAsymptotic behaviour of large Gaussian correlated Wishart matrices
Nourdin, Ivan UL; Zheng, Guangqu UL

E-print/Working paper (2018)

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See detailLe développement du trafic ferroviaire dans la Grande Région SaarLorLux
Helfer, Malte UL; Pauly, Michel UL; Caruso, Geoffrey UL et al

E-print/Working paper (2018)

The first railways are mentioned in connection with the mining of Agricola in 1556. From the end of the 18th century onwards, the first long-distance horse-drawn railways were built, some of which created ... [more ▼]

The first railways are mentioned in connection with the mining of Agricola in 1556. From the end of the 18th century onwards, the first long-distance horse-drawn railways were built, some of which created real networks. The first railway line to use steam locomotives was the Stockton and Darlington Railway, 40 kilometres long, commissioned in 1825 in England. On the continent, the first steam railway line was opened on 5 May 1835 in Belgium, between Brussels and Mechelen, while the line opened in 1831 in France, from Saint-Etienne to Lyon, as well as the one in December 1835 in Germany, between Nürnberg and Fürth, were only rarely used by locomotives, but rather by horse-drawn vehicles. This article deals with the first railway connections in the various regions of the Greater Region SaarLorLux. [less ▲]

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See detailIncome Inequality, Productivity, and International Trade
Picard, Pierre M UL; Hsu, Wen-Tai; Lin, Lu

E-print/Working paper (2018)

This paper discusses the effect of income inequality on selection and aggregate productivity in a general equilibrium model with non-homothetic preferences. It shows the existence of a negative ... [more ▼]

This paper discusses the effect of income inequality on selection and aggregate productivity in a general equilibrium model with non-homothetic preferences. It shows the existence of a negative relationship between the number and quantity of products consumed by an income group and the earnings of other income groups. It also highlights the negative effect of a mean-preserving spread of income on aggregate productivity through the softening of firms’ selection. This effect is however mitigated in the presence of international trade. In a quantitative analysis, it is shown that an excessively large mean-preserving spread of income may harm the rich as it raises firms’ markups on their purchases. This is contrary to the general belief that income inequality benefits the rich. [less ▲]

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See detailToo Much Unity in the European Union’s External Migration Policy?
Gatti, Mauro UL

E-print/Working paper (2018)

Detailed reference viewed: 73 (3 UL)
See detailLa réponse au défi migratoire : «Europe souveraine» ou «souverainisme de repli» ?
Gatti, Mauro UL

E-print/Working paper (2018)

La migration est probablement le « défi majeur » de l’Europe, aujourd’hui et dans les années qui viennent, comme le reconnaît Emmanuel Macron dans son discours de la Sorbonne de septembre 2017. On peut ... [more ▼]

La migration est probablement le « défi majeur » de l’Europe, aujourd’hui et dans les années qui viennent, comme le reconnaît Emmanuel Macron dans son discours de la Sorbonne de septembre 2017. On peut noter, par ailleurs, que la gestion de ce défi est à présent inadéquate : si 285.000 migrants ont été sauvés par des opérations coordonnées par l’Union européenne, 3.139 sont morts en 2017 ; en outre, l’état des droits des migrants dans l’Union et, surtout, dans les pays partenaires, reste problématique. Le « souverainisme de repli » n’assure aucune solution : « l’Europe seule peut, en un mot, assurer une souveraineté réelle » (Macron). Et la souveraineté de l’Europe – conçue comme la « capacité à exister dans le monde actuel pour y défendre nos valeurs et nos intérêts » – ne peut que s’assurer par la « solidarité » entre les Etats membres. Emmanuel Macron propose deux solutions au défi de la migration, qui paraissent toutefois insuffisantes ou illusoires : la création d’un « espace commun des frontières » vis-à- vis de l’extérieur et une gestion plus efficace de l’asile à l’intérieur de l’Union. [less ▲]

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See detailDémographie et migration: Attractivité versus contraction
Nienaber, Birte UL; Hamez, Grégory; Mangels, Kirsten

E-print/Working paper (2018)

This working paper includes analyses of demography and migration in the Greater region. It has a special view on cross-border mobility, ageing and health infrastructure in rural areas.

Detailed reference viewed: 78 (2 UL)
See detail« Aus dem Wartezimmer des Krieges »: The Non-Experience of World War One in Luxembourg
Millim, Anne-Marie UL

E-print/Working paper (2018)

This article aims to contribute to the reconstruction of Luxembourg’s war experience and to analyse Weber’s literary and theoretical renditions of these events. It will investigate Weber’s experience of ... [more ▼]

This article aims to contribute to the reconstruction of Luxembourg’s war experience and to analyse Weber’s literary and theoretical renditions of these events. It will investigate Weber’s experience of non-experience and highlight the ways in which he sought to describe and overcome the sense of ineffectuality and uselessness that came with being ‘put on hold’ by the war as a nation and as a human being. Weber’s reflections mix physical, mental, and intellectual pain, creating a sense of absurdist, non-productive suffering, which he, with wavering conviction, seeks to counteract by drawing on the physicality of the personal and collective body. [less ▲]

Detailed reference viewed: 102 (5 UL)
See detailFirst Experiments with a Flexible Infrastructure for Normative Reasoning
Benzmüller, Christoph UL; Parent, Xavier UL

E-print/Working paper (2018)

A flexible infrastructure for normative reasoning is outlined. A small-scale demonstrator version of the envisioned system has been implemented in the proof assistant Isabelle/HOL by utilising the first ... [more ▼]

A flexible infrastructure for normative reasoning is outlined. A small-scale demonstrator version of the envisioned system has been implemented in the proof assistant Isabelle/HOL by utilising the first authors universal logical reasoning approach based on shallow semantical embeddings in meta-logic HOL. The need for such a flexible reasoning infrastructure is motivated and illustrated with a contrary-to-duty example scenario selected from the General Data Protection Regulation. [less ▲]

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See detailOn the Hilbert eigenvariety at exotic and CM classical weight 1 points
Deo, Shaunak UL; Betina, Adel; Fite, Francesc

E-print/Working paper (2018)

Detailed reference viewed: 90 (0 UL)
See detailI/O Logic in HOL --- First Steps
Benzmüller, Christoph UL; Parent, Xavier UL

E-print/Working paper (2018)

A semantical embedding of input/output logic in classical higher-order logic is presented. This embedding enables the mechanisation and automation of reasoning tasks in input/output logic with off-the ... [more ▼]

A semantical embedding of input/output logic in classical higher-order logic is presented. This embedding enables the mechanisation and automation of reasoning tasks in input/output logic with off-the-shelf higher-order theorem provers and proof assistants. The key idea for the solution presented here results from the analysis of an inaccurate previous embedding attempt, which we will discuss as well. [less ▲]

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See detailTASKS, TECHNOLOGY, AND FACTOR PRICES IN THE NEOCLASSICAL PRODUCTION SECTOR
Irmen, Andreas UL

E-print/Working paper (2018)

This paper introduces tasks into the neoclassical production sector. Competitive firms choose the profit-maximizing amounts of factor-specific tasks that determine their factor demands and output supplies ... [more ▼]

This paper introduces tasks into the neoclassical production sector. Competitive firms choose the profit-maximizing amounts of factor-specific tasks that determine their factor demands and output supplies. We show that the effect of factor-augmenting technical change on relative and absolute factor prices can be decomposed into a productivity effect and a market size effect of opposite sign. These effects appear since the novel task-based approach distinguishes between the demands for tasks and the demands for factors. This perspective provides a new intuition for the emergence of relative and absolute factor biases and the role of the elasticity of substitution. [less ▲]

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See detailHybrid model for word prediction using naive bayes and latent information
Goulart, Henrique X.; Dalle Lucca Tosi, Mauro UL; Goncalves, Daniel et al

E-print/Working paper (2018)

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See detailL’industrie textile dans la Grande Région SaarLorLux
Edelblutte, Simon; Helfer, Malte UL; Caruso, Geoffrey UL et al

E-print/Working paper (2018)

The textile industry has had a long time to transform the industrial landscape of the Greater Region SaarLorLux, as it is one of the earliest industrialised economic activities. Often born on a proto ... [more ▼]

The textile industry has had a long time to transform the industrial landscape of the Greater Region SaarLorLux, as it is one of the earliest industrialised economic activities. Often born on a proto-industrial basis, it was mechanised very early on in most of its branches (from spinning to weaving, dyeing, bleaching and printing to clothing) and thus formed, sometimes, vast industrial concentrations, which imposed themselves alongside more modest establishments. However, this pioneering industry is now often presented in Europe as an activity of the past, the bulk of which has been relocated to low labour cost countries in the South. [less ▲]

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See detailIsolation of nucleic acids from low biomass samples: detection and removal of sRNA contaminants
Heintz-Buschart, Anna; Yusuf, Dilmurat; Kaysen, Anne UL et al

E-print/Working paper (2017)

Sequencing-based analyses of low-biomass samples are known to be prone to misinterpretation due to the potential presence of contaminating molecules derived from laboratory reagents and environments. Due ... [more ▼]

Sequencing-based analyses of low-biomass samples are known to be prone to misinterpretation due to the potential presence of contaminating molecules derived from laboratory reagents and environments. Due to its inherent instability, contamination with RNA is usually considered to be unlikely. Here we report the presence of small RNA (sRNA) contaminants in widely used microRNA extraction kits and means for their depletion. Sequencing of sRNAs extracted from human plasma samples was performed and significant levels of non-human (exogenous) sequences were detected. The source of the most abundant of these sequences could be traced to the microRNA extraction columns by qPCR-based analysis of laboratory reagents. The presence of artefactual sequences originating from the confirmed contaminants were furthermore replicated in a range of published datasets. To avoid artefacts in future experiments, several protocols for the removal of the contaminants were elaborated, minimal amounts of starting material for artefact-free analyses were defined, and the reduction of contaminant levels for identification of bona fide sequences using 'ultra-clean' extraction kits was confirmed. In conclusion, this is the first report of the presence of RNA molecules as contaminants in laboratory reagents. The described protocols should be applied in the future to avoid confounding sRNA studies. [less ▲]

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See detailData Protection Directive (EU) 2016/680 for Police and Criminal Justice Authorities
Quintel, Teresa Alegra UL; Sajfert, Juraj

E-print/Working paper (2017)

In May 2018, the EU Data Protection Reform became applicable. In particular the General Data Protection Regulation (EU) 2016/679 (GDPR), which repealed Directive 95/46/EC on 25 May 2018 attracted much ... [more ▼]

In May 2018, the EU Data Protection Reform became applicable. In particular the General Data Protection Regulation (EU) 2016/679 (GDPR), which repealed Directive 95/46/EC on 25 May 2018 attracted much attention, albeit resembling its predecessor. Alongside the GDPR, the Reform encompassed a Directive (EU) 2016/680 establishing rules for the protection of individuals with regard to the processing of personal data by competent authorities for purposes of law enforcement (LED). The LED put forth great achievements in areas that had previously not been regulated by EU law. Therefore, the LED constitutes a major step forward in establishing a comprehensive EU data protection regime, as the first horizontal and legally binding instrument laying down the rules for national and cross-border processing of personal data in the area of law enforcement. Although the LED received way less attention than the GDPR, two main objectives of the Directive are too important to be neglected: the increased level of fundamental rights protection in the area of police and criminal justice, and the improved sharing of personal data between the Member States, as they will be able to rely on uniform data protection rules. The LED is a modern instrument, designed for the processing of personal data by Law Enforcement Authorities (LEAs) in the Digital Age, which is why there is no doubt that instruments such as the Directive are rapidly gaining in importance and visibility: firstly, an increased number of criminal acts is being committed online or with the help of online tools. Perpetrators of crime leave digital traces that may support LEAs in their tasks of crime prevention, detection, investigation and prosecution. Secondly, as perpetrators are becoming more tech-savvy, LEAs turned to new investigative techniques, including big data analytics. The term big data police technologies may include predictive systems that identify people or places suspected of crime, surveillance systems to monitor at-risk areas and search systems to mine data for investigative clues or to develop intelligence nets of helpful data for groups or across communities. Thirdly, EU rules on the processing of personal data by LEAs are undergoing consolidation, with the LED acting as a locomotive. The rules of the LED, which had to be transposed into the national laws of all 28 Member States and the four Schengen Area States (Norway, Iceland, Switzerland and Lichtenstein) by 6 May 2018, benefited from the attention given to the GDPR, as some of the Regulation’s solutions could simply be taken over. However, a number of provisions were developed specifically for the LED. This Article will give a general overview of the LED structure, its scope and briefly present the ten chapters. The second part of the Article will address four distinct features enshrined in the LED, focussing on automated individual decision-making (Article 11), the indirect exercise of data subject rights (Article 17), the obligation for competent authorities to keep logs (Article 25) and the provisions on international transfers (Articles 35-39). It will thereby critically assess the articles and point to both similarities and differences with regard to the GDPR. [less ▲]

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See detailDie allgemeine Lebenszufriedenheit von Schülern in Luxemburg
Kern, Matthias Robert UL; Residori, Caroline UL; Heinz, Andreas UL et al

E-print/Working paper (2017)

Detailed reference viewed: 146 (21 UL)
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See detailGesundheitsbeschwerden von Schülern in Luxemburg
Heinz, Andreas UL; Kern, Matthias Robert UL; Residori, Caroline UL et al

E-print/Working paper (2017)

Detailed reference viewed: 138 (31 UL)
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See detailInternetdelikte und die Herausforderungen des Forum Shoppings
Schmitz, Sandra UL

E-print/Working paper (2017)

Detailed reference viewed: 93 (1 UL)
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See detailL'ethnographie du travail
de Saint-Georges, Ingrid UL

E-print/Working paper (2017)

Detailed reference viewed: 103 (2 UL)
See detailFamily, Community and Life-Cycle Earnings: Evidence from Siblings and Youth Peers
Bingley, Paul; Cappellari, Lorenzo; Tatsiramos, Konstantinos UL

E-print/Working paper (2017)

Detailed reference viewed: 79 (2 UL)
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See detailLifting trianguline Galois representations
Conti, Andrea UL

E-print/Working paper (2017)

For a central isogeny $H^\prime\to H$ of group schemes over a $p$-adic field $E$ and a continuous representation $\rho\colon\mathr{Gal}(\overline F/F)\to H(E)$ of the absolute Galois group of a number ... [more ▼]

For a central isogeny $H^\prime\to H$ of group schemes over a $p$-adic field $E$ and a continuous representation $\rho\colon\mathr{Gal}(\overline F/F)\to H(E)$ of the absolute Galois group of a number field $F$, trianguline at the $p$-adic places, we give sufficient conditions for the existence of a lift of $\rho$ to a continuous representation $\mathrm{Gal}(\overline F/F)\to H^\prime(E)$ that is also trianguline at the $p$-adic places. This is an analogue in the world of non-de Rham representations of results of Wintenberger, Conrad, Patrikis, and Hoang Duc for $p$-adic Hodge-theoretic properties of $\rho$. Our main tool for studying $p$-adic Galois representation locally at $p$ is an abstract Tannakian construction combined with the theory of $B$-pairs; our result and concrete manipulation of the $B$-pairs are inspired by recent work of Berger and Di Matteo. [less ▲]

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See detailÜbergewicht bei Schülern in Luxemburg
Residori, Caroline UL; Kern, Matthias Robert UL; Heinz, Andreas UL et al

E-print/Working paper (2017)

Detailed reference viewed: 128 (26 UL)
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See detailMechanizing Principia Logico-Metaphysica in Functional Type Theory
Kirchner, Daniel; Benzmüller, Christoph UL; Zalta, Edward N.

E-print/Working paper (2017)

Principia Logico-Metaphysica proposes a foundational logical theory for metaphysics, mathematics, and the sciences. It contains a canonical development of Abstract Object Theory [AOT], a metaphysical ... [more ▼]

Principia Logico-Metaphysica proposes a foundational logical theory for metaphysics, mathematics, and the sciences. It contains a canonical development of Abstract Object Theory [AOT], a metaphysical theory (inspired by ideas of Ernst Mally, formalized by Zalta) that differentiates between ordinary and abstract objects. This article reports on recent work in which AOT has been successfully represented and partly automated in the proof assistant system Isabelle/HOL. [less ▲]

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See detailTime Averages of Markov Processes and Applications to Two-Timescale Problems
Pepin, Bob UL

E-print/Working paper (2017)

Detailed reference viewed: 53 (1 UL)
See detail3D Printing: The Next 5 years by Claude Wolf – Into the Future engineered by the Zs
Wolf, Claude UL

E-print/Working paper (2017)

3D Printing: The Next 5 years by Claude Wolf – Into the Future engineered by the Zs The future of 3D Printing or Additive Manufacturing [AM] will be driven by the next generation of engineers who are just ... [more ▼]

3D Printing: The Next 5 years by Claude Wolf – Into the Future engineered by the Zs The future of 3D Printing or Additive Manufacturing [AM] will be driven by the next generation of engineers who are just about to qualify, the Z generation (1994-2010). Do we, educators, know this Z generation? Do we know what motivates them? The Z generation is a generation of digital natives interacting with PCs, iPads, smartphones and the internet since birth, a pragmatic and short term orientated generation. Our prejudice brands them as unprepared and unmotivated, with their 10 second attention spans, but in reality, they have already proven they are creative, determined and hardworking as well as team oriented, when they are given the opportunity. They have understood that 3D printing offers them this opportunity. [less ▲]

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See detailTommaso Padoa-Schioppa [biography]
Chiocchetti, Paolo UL

E-print/Working paper (2017)

Tommaso Padoa-Schioppa (1940-2010) was an Italian banker, economist, and politician. He was one of the "architects of the euro" and helped to push forward the financial, monetary, and economic integration ... [more ▼]

Tommaso Padoa-Schioppa (1940-2010) was an Italian banker, economist, and politician. He was one of the "architects of the euro" and helped to push forward the financial, monetary, and economic integration of Europe. [less ▲]

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Peer Reviewed
See detailDynamics of Income Rank Volatility: Evidence from Germany and the US
Chauvel, Louis UL; Hartung, Anne UL; Palmisano, Flaviana

E-print/Working paper (2017)

This paper presents a methodology for comparing income rank volatility profiles over time and across distributions. While most of the existing measures are affected by changes in marginal distributions ... [more ▼]

This paper presents a methodology for comparing income rank volatility profiles over time and across distributions. While most of the existing measures are affected by changes in marginal distributions, this paper proposes a framework that is based on individuals’ relative positions in the distribution, and is neutral in relation to structural changes that occur in the economy. Applying this approach to investigate rank volatility in Germany and the US over three decades, we show that while poorer individuals within both countries are the most volatile, the volatility trend for the middle class in each of these countries differs. [less ▲]

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See detailTowards a Quantitative Averaging Principle for Stochastic Differential Equations
Pepin, Bob UL

E-print/Working paper (2017)

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Peer Reviewed
See detailIsogeometric analysis of thin Reissner-Mindlin plates and shells: Locking phenomena and generalized local B-bar method
Hu, Qingyuan UL; Xia, Yang; Natarajan, Sundararajan et al

E-print/Working paper (2017)

We propose a generalized local $\bar{B}$ framework, addressing locking in degenerated Reissner-Mindlin plate and shell formulations in the context of isogeometric analysis. Parasitic strain components are ... [more ▼]

We propose a generalized local $\bar{B}$ framework, addressing locking in degenerated Reissner-Mindlin plate and shell formulations in the context of isogeometric analysis. Parasitic strain components are projected onto the physical space locally, i.e. at the element level, using a least-squares approach. The formulation is general and allows the flexible utilization of basis functions of different order as the projection bases. The present formulation is much cheaper computationally than the global $\bar{B}$ method. Through numerical examples, we show the consistency of the scheme, although the method is not Hu-Washizu variationally consistent. The numerical examples show that the proposed formulation alleviates locking and yields good accuracy for various thicknesses, even for slenderness ratios of $1 \times 10^5$, and has the ability to capture deformations of thin shells using relatively coarse meshes. From the detailed numerical study, it can be opined that the proposed method is less sensitive to locking and mesh distortion. [less ▲]

Detailed reference viewed: 251 (15 UL)
See detailDemocratic legitimacy [glossary]
Chiocchetti, Paolo UL

E-print/Working paper (2017)

A political institution is legitimate when it succeeds in persuading people of the normative necessity of its existence. In a democratic system, this can be based both on various forms of popular consent ... [more ▼]

A political institution is legitimate when it succeeds in persuading people of the normative necessity of its existence. In a democratic system, this can be based both on various forms of popular consent (democratic legitimacy) and on other kinds of foundations (generic legitimacy). With reference to the European Union, debates have focused on empirical support for the EU, the nature of its "democratic deficit", and the potential conflict between European integration and national democratic sovereignty. [less ▲]

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See detailNotes on the Schwarzian tensor and measured foliations at infinity of quasifuchsian manifolds.
Schlenker, Jean-Marc UL

E-print/Working paper (2017)

The boundary at infinity of a quasifuchsian hyperbolic manifold is equiped with a holomorphic quadratic differential. Its horizontal measured foliation $f$ can be interpreted as the natural analog of the ... [more ▼]

The boundary at infinity of a quasifuchsian hyperbolic manifold is equiped with a holomorphic quadratic differential. Its horizontal measured foliation $f$ can be interpreted as the natural analog of the measured bending lamination on the boundary of the convex core. This analogy leads to a number of questions. We provide a variation formula for the renormalized volume in terms of the extremal length $\ext(f)$ of $f$, and an upper bound on $\ext(f)$. \par We then describe two extensions of the holomorphic quadratic differential at infinity, both valid in higher dimensions. One is in terms of Poincar\'e-Einstein metrics, the other (specifically for conformally flat structures) of the second fundamental form of a hypersurface in a "constant curvature" space with a degenerate metric, interpreted as the space of horospheres in hyperbolic space. This clarifies a relation between linear Weingarten surfaces in hyperbolic manifolds and Monge-Amp\`ere equations. Notes aiming at clarifying the relations between different points of view and introducing one new notion, no real result. Not intended to be submitted at this point [less ▲]

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See detailArbeitsmotivation von Arbeitnehmern in Luxemburg
Sischka, Philipp UL; Steffgen, Georges UL

E-print/Working paper (2017)

Die europäische Studie EWCS (Eurofund, 2016a, 2016b) zeigt auf, dass sich die Arbeitsmotivation der Arbeitnehmer in Luxemburg eher im mittleren Bereich wiederfindet. Die nationale Studie Quality of Work ... [more ▼]

Die europäische Studie EWCS (Eurofund, 2016a, 2016b) zeigt auf, dass sich die Arbeitsmotivation der Arbeitnehmer in Luxemburg eher im mittleren Bereich wiederfindet. Die nationale Studie Quality of Work Index belegt nur geringfügige Unterschiede der Arbeitsmotivation sowohl zwischen männlichen und weiblichen Arbeitnehmern als auch zwischen den verschiedenen Altersgruppen. Arbeitnehmer in einer Vorgesetztenposition, Manager und Führungskräfte zeigen im Durchschnitt eine höhere, Hilfsarbeitskräfte dagegen im Durchschnitt eine geringere Arbeitsmotivation. Überdurchschnittlich motiviert erweisen sich Arbeitnehmer in Nichtregierungsorganisationen (NGO). Die Arbeitsmotivation ist dabei mit verschiedenen psychosozialen Abeitsbedingungen sowie Arbeitsrahmenbedingungen korreliert. Parizipation an Entscheidungen, Feedback von Kollegen und Vorgesetzten, Kooperation unter Kollegen sowie Rollenklarheit sind positiv mit Arbeitsmotivation assoziert, das Erleben von Konkurrenz und Mobbing sind hingegen negativ assoziiert. Hinsichtlich Arbeitsrahmenbedingungen weist vor allem Arbeitsplatzsicherheit einen hohen Zusammenhang mit der Arbeitsmotivation auf, gefolgt von Einkommenszufriedenheit und Ausbildungsmöglichkeiten. [less ▲]

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See detailHerman Van Rompuy [biography]
Chiocchetti, Paolo UL

E-print/Working paper (2017)

Herman Van Rompuy (b. 1947) is a Belgian and European politician. In his capacity as President of the European Council (2009-2014), he played a key role in the EU's response to the financial crisis and in ... [more ▼]

Herman Van Rompuy (b. 1947) is a Belgian and European politician. In his capacity as President of the European Council (2009-2014), he played a key role in the EU's response to the financial crisis and in the strengthening of the European framework of economic governance. [less ▲]

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See detailWolfgang Schäuble [biography]
Chiocchetti, Paolo UL

E-print/Working paper (2017)

Wolfgang Schäuble (b. 1942) is an active German politician. He played a key role in the German reunification process (1989-90) and in the management of the Eurozone crisis (since 2009).

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See detailResearch Report
Stogianni, Maria UL

E-print/Working paper (2017)

Detailed reference viewed: 57 (1 UL)
See detailSolidarity [glossary]
Chiocchetti, Paolo UL

E-print/Working paper (2017)

The principle of solidarity plays a key role in discussions of social, economic, and political issues. A polysemic notion, it may interrogate either individuals or public authorities. It often represents ... [more ▼]

The principle of solidarity plays a key role in discussions of social, economic, and political issues. A polysemic notion, it may interrogate either individuals or public authorities. It often represents the counterpart of competition in the analysis and assessment of social norms and public policies. [less ▲]

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See detailWho Trade at Better Prices?
Wolff, Christian UL; Ekkayokkaya, Manapol

E-print/Working paper (2017)

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See detailLocalisation résidentielle de la population étrangère selon la nationalité et la structure urbaine au Luxembourg
Pigeron-Piroth, Isabelle UL; Heinz, Andreas UL; Caruso, Geoffrey UL

E-print/Working paper (2017)

The number of foreigners living in Luxembourg is still rising and represents today about 48% of the inhabitants. This study focuses on the description and mapping of the place of residence for the ... [more ▼]

The number of foreigners living in Luxembourg is still rising and represents today about 48% of the inhabitants. This study focuses on the description and mapping of the place of residence for the different nationalities living in Luxembourg. It seeks to underline differences through indicators built from the 2011 census data. We focus on the territorial distribution of the different nationalities by taking into account the urban structure and distance to jobs. If differences according to nationalities in the residential behavior of households can be empirically identified they may raise issues of spatial equity and (un)equal accessibility to job market. We analyse whether the geographic location of different nationalities in Luxembourg is linked to urbanisation level, the distance to the “poles d´emploi” or general accessibility to jobs. [less ▲]

Detailed reference viewed: 223 (6 UL)
See detailThe European Commission’s "Reflection Paper on Harnessing Globalisation"
Chiocchetti, Paolo UL

E-print/Working paper (2017)

The new EC reflection paper on globalisation sets new accents, but contains no major departure from current policy orientations. It takes a clear stand for free trade, while attacking "unfair competition ... [more ▼]

The new EC reflection paper on globalisation sets new accents, but contains no major departure from current policy orientations. It takes a clear stand for free trade, while attacking "unfair competition" and arguing for a "balanced, rules-based and progressive trade and investment agenda". Despite its insistence on a managed globalisation and a fair redistribution of its benefits, its proposals are unlikely to allay domestic anxieties and external criticism. [less ▲]

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Peer Reviewed
See detailCross-border mergers and acquisitions: Evidence from Indochina
Wolff, Christian UL

E-print/Working paper (2017)

Detailed reference viewed: 44 (1 UL)
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See detail3. Forschungsbericht zur Weiterentwicklung des Arbeitsqualitätsindexes in Luxemburg
Sischka, Philipp UL; Steffgen, Georges UL

E-print/Working paper (2017)

Der Survey zu dem „Quality of Work Index Luxembourg“ (QoW), der von der Universität Luxemburg und der luxemburgischen Chambre des Salariés entwickelt wurde (Steffgen, Kohl, 2013; Sischka, Steffgen, 2015 ... [more ▼]

Der Survey zu dem „Quality of Work Index Luxembourg“ (QoW), der von der Universität Luxemburg und der luxemburgischen Chambre des Salariés entwickelt wurde (Steffgen, Kohl, 2013; Sischka, Steffgen, 2015, 2016), wurde 2016 bereits zum vierten Mal mittels einer telefonischen Befragung durchgeführt. Ziel des Index ist es, die erlebte Arbeitssituation und -qualität luxemburgischer Arbeitnehmer zu erfassen. Der vorliegende Bericht dokumentiert die psychometrische Testung der Güte des aktuellen Erhebungsinstruments. Dazu erfolgt zunächst eine Beschreibung der für die Skalen genutzten Items, die Überprüfung der internen Konsistenz der jeweiligen Skala mittels verschiedener Reliabilitätsstatistiken (Cronbach’s Alpha, Korrelationsanalysen der Items) sowie Koeffizienten zur Beschreibung der Skalenverteilung. Explorative und konfirmatorische Faktorenanalysen dienen dazu, zu testen, ob die Items auf den a priori festgelegten Faktoren laden und ob sich die unterstellte Faktorenstruktur auch in den Daten zeigt. Außerdem werden die Zusammenhänge der Skalen mittels Korrelationsanalysen überprüft. Die QoW-Skalen werden außerdem auf verschiedene Well-Being-Skalen regressiert, um deren Relevanz für den QoW-Index zu prüfen. Da der QoW Survey teilweise als Panelbefragung durchgeführt wird, wird außerdem geklärt, ob es hinsichtlich demographischer Eigenschaften der Befragten, hinsichtlich der QoW-Skalen oder hinsichtlich verschiedener Well-Being-Maße zu systematischen Ausfällen seit der letzten Welle gekommen ist. Ebenso werden einige Längsschnitt-Regressionsanalysen gerechnet, um zu überprüfen, ob einige Arbeitsbedingungen längerfristige Effekte auf das Well-Being der Arbeitnehmer aufweisen. Abschließend wird das gesamte Erhebungsinstrument zusammenfassend diskutiert und Empfehlungen bezüglich der weiteren Entwicklung der Skalen gegeben. [less ▲]

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See detailState of the Art in Lightweight Symmetric Cryptography
Biryukov, Alex UL; Perrin, Léo Paul UL

E-print/Working paper (2017)

Lightweight cryptography has been one of the ``hot topics'' in symmetric cryptography in the recent years. A huge number of lightweight algorithms have been published, standardized and/or used in ... [more ▼]

Lightweight cryptography has been one of the ``hot topics'' in symmetric cryptography in the recent years. A huge number of lightweight algorithms have been published, standardized and/or used in commercial products. In this paper, we discuss the different implementation constraints that a ``lightweight'' algorithm is usually designed to satisfy. We also present an extensive survey of all lightweight symmetric primitives we are aware of. It covers designs from the academic community, from government agencies and proprietary algorithms which were reverse-engineered or leaked. Relevant national (\nist{}...) and international (\textsc{iso/iec}...) standards are listed. We then discuss some trends we identified in the design of lightweight algorithms, namely the designers' preference for \arx{}-based and bitsliced-S-Box-based designs and simple key schedules. Finally, we argue that lightweight cryptography is too large a field and that it should be split into two related but distinct areas: \emph{ultra-lightweight} and \emph{IoT} cryptography. The former deals only with the smallest of devices for which a lower security level may be justified by the very harsh design constraints. The latter corresponds to low-power embedded processors for which the \aes{} and modern hash function are costly but which have to provide a high level security due to their greater connectivity. [less ▲]

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See detailLa restructuration des dettes publiques saisie par le droit de l'Union européenne
Allemand, Frederic UL

E-print/Working paper (2017)

En juillet 2015, le sommet de la zone euro fait part de l'existence de "sérieux doutes" sur le caractère soutenable de la dette grecque. La possibilité d'un reprofilage de la dette est envisagé et sa ... [more ▼]

En juillet 2015, le sommet de la zone euro fait part de l'existence de "sérieux doutes" sur le caractère soutenable de la dette grecque. La possibilité d'un reprofilage de la dette est envisagé et sa discussion reportée à la réalisation de la première évaluation des mesures d'ajustement mises en oeuvre par la Grèce. Toute décote nominale est cependant formellement exclue, car contraire au droit de l'Union. Les discussions se sont ouvertes au printemps 2016 sur les modalités d'allègement de la dette publique de la Grèce. Le sujet a été au coeur de la réunion de l'Eurogroupe du 22 mai. Aucun accord n'a été trouvé, mais les discussions continuent. Dans ce contexte, Frédéric Allemand a présenté le 17 mai dernier une communication sur la saisine des opérations de restructuration par le droit de l'Union lors du séminaire de recherche pluridisciplinaire "Les administrations publiques à l'épreuve de leur dette" organisé par Jean-François Boudet (Université Paris II) et Caroline Lequesne-Roth (Université de Nice). L'auteur conclut à la compétence de l'Union pour encadrer la restructuration des dettes publiques des États membres. [less ▲]

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See detailUnderstanding audit oversight transformation : ramifications of institutional work and the power of (de-)mythologizing
Löhlein, Lukas; Muessig, Anke UL

E-print/Working paper (2017)

This study investigates the dynamics that transformed audit oversight in Germany from an instrument, organized by the profession, to maintain international legitimacy into a regulatory regime that is ... [more ▼]

This study investigates the dynamics that transformed audit oversight in Germany from an instrument, organized by the profession, to maintain international legitimacy into a regulatory regime that is integrated into the state apparatus. While prior research has focused on countries where the global demand for oversight structures overlapped with local pressures for regulatory reforms, we examine the diffusion of patterns of control within a context that is characterized by a strong mythologized belief in the German qualified statutory auditor and professional self-regulation. By analysing archival documents and interviews with key actors, we investigate through the lens of institutional work how initially the audit establishment maintained the existing self-regulatory logic despite, and because of, the implementation of formal independent oversight structures. We illustrate how the institutional work of small auditors aimed at disrupting the large audit firms’ field dominance unintentionally undermined the mythologized self-regulation. In doing so, we offer insights into how institutional myth is both constructed and dismantled. Our focus on multiple actors allows us to shed light on how parallel institutional work of distinct actors can lead to mutually effective and unintended institutional consequences. We argue that a successful institutional worker executes a combination of two basic types of work, which we refer to as existential and instrumental modes of work. Finally, comparing our findings with literature on audit oversight in other countries allows us to conceptualize audit oversight along a political-operational dimension and a public-private dimension. [less ▲]

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See detailGesundheitsverhalten von Arbeitnehmern in Luxemburg
Sischka, Philipp UL; Steffgen, Georges UL

E-print/Working paper (2017)

Insbesonders unter den jüngeren Arbeitnehmern und unter den Arbeitnehmern mit geringer Bildung ist der Anteil der Raucher vergleichsweise hoch. Männliche und ältere Arbeitnehmer weisen wieder einen ... [more ▼]

Insbesonders unter den jüngeren Arbeitnehmern und unter den Arbeitnehmern mit geringer Bildung ist der Anteil der Raucher vergleichsweise hoch. Männliche und ältere Arbeitnehmer weisen wieder einen vergleichsweise hohen Alkoholkonsum auf. Differenziert nach Berufsgruppen zeigen vor allem Arbeitnehmer in Handwerksberufen sowie Manager und Führungskräfte einen hohen Alkoholkonsum. Die Arbeitnehmer in der jüngsten Altersgruppe (16 bis 24 Jährige) schlafen durchschnittlich etwas länger, im Vergleich zu den älteren Arbeitnehmern. Außerdem ist die Sporthäufigkeit in der jüngsten Altersgruppe am höchsten. Männliche Arbeitnehmer sowie Arbeitnehmer ohne Partner oder ohne Kinder treiben ebenfalls überduchschnittlich häufig Sport. Etwa 17% der Arbeitnehmer leidet unter Adipositas. Knapp 30% der Arbeitnehmer leidet manchmal oder häufiger an gesundheitlichen Problemen. Unter den gesundheitlichen Problemen sind Rückenprobleme besonders häufig, gefolgt von Schlafschwierigkeiten und Kopfschmerzen. Herzprobleme sind dagegen eher selten ausgeprägt. Arbeitnehmer mit Hochschulabschluss sowie Manager und Führungskräfte sind seltener von Gesundheitsproblemen betroffen. Gesundheitliche Probleme sind insgesamt mit Zigarettenkonsum, Schlafstunden pro Tag, Sporthäufigkeit und Body Mass Index assoziiert: Je weniger geraucht wird, je mehr geschlafen und Sport getrieben wird und je geringer das körperliche Gewicht der Arbeitnehmer, desto weniger Gesundheitsprobleme liegen tendenziell vor. [less ▲]

Detailed reference viewed: 130 (8 UL)
See detailThe economic programme of Emmanuel Macron
Chiocchetti, Paolo UL

E-print/Working paper (2017)

The outsider Emmanuel Macron is the winner of the first round of the French presidential election. His economic programme is betting on a strategy of fiscal consolidation, tax cuts, targeted investments ... [more ▼]

The outsider Emmanuel Macron is the winner of the first round of the French presidential election. His economic programme is betting on a strategy of fiscal consolidation, tax cuts, targeted investments, and further Europeanisation. Success crucially hinges on the outcome of the June legislative elections and on a favourable evolution of the global economic environment. [less ▲]

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See detailScaling evidence of the homothetic nature of cities
Lemoy, Rémi UL; Caruso, Geoffrey UL

E-print/Working paper (2017)

In this paper we analyse the profile of land use and population density with respect to the distance to the city centre for the European city. In addition to providing the radial population density and ... [more ▼]

In this paper we analyse the profile of land use and population density with respect to the distance to the city centre for the European city. In addition to providing the radial population density and soil-sealing profiles for a large set of cities, we demonstrate a remarkable constancy of the profiles across city size. Our analysis combines the GMES/Copernicus Urban Atlas 2006 land use database at 5m resolu- tion for 300 European cities with more than 100.000 inhabitants and the Geostat population grid at 1km resolution. Population is allocated proportionally to surface and weighted by soil sealing and density classes of the Urban Atlas. We analyse the profile of each artificial land use and population with distance to the town hall. In line with earlier literature, we confirm the strong monocentricity of the European city and the negative exponential curve for population density. Moreover, we find that land use curves, in particular the share of housing and roads, scale along the two horizontal dimensions with the square root of city population, while population curves scale in three dimensions with the cubic root of city population. In short, European cities of different sizes are homothetic in terms of land use and population density. While earlier literature documented the scaling of average densities (total surface and population) with city size, we document the scaling of the whole radial distance profile with city size, thus liaising intra-urban radial analysis and systems of cities. In addition to providing a new empirical view of the European city, our scaling offers a set of practical and coherent definitions of a city, independent of its population, from which we can re-question urban scaling laws and Zipf’s law for cities. [less ▲]

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See detailBenelux, Europe and the Cold War, the power of non-powers
Paravantis, Spero UL

E-print/Working paper (2017)

The conference “Benelux, Europe and the Cold War, the power of non-powers”, which took place on 30 and 31 March 2017 at the University of Luxembourg, was the first of three events planned in the FNR ... [more ▼]

The conference “Benelux, Europe and the Cold War, the power of non-powers”, which took place on 30 and 31 March 2017 at the University of Luxembourg, was the first of three events planned in the FNR-funded CORE junior project “Benelux”, as part of its public outreach and academic output objectives. The conference sought to highlight asymmetrical power relations in the Cold War period of European integration by examining European security. What was/is European security in the context of the Cold War? How was and is it conceived? What role did “non-powers” play in European security, and how did they help define it? This conference investigated these and other related questions by re-examining the US/European relationship in the early Cold War and the role that developments during this period played in the European integration movement. In so doing, the conference also showcased findings which helped unify historiographies of the Cold War and European integration. [less ▲]

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See detailUniversal Reasoning, Rational Argumentation and Human-Machine Interaction
Benzmüller, Christoph UL

E-print/Working paper (2017)

Classical higher-order logic, when utilized as a meta-logic in which various other (classical and non-classical) logics can be shallowly embedded, is well suited for realising a universal logic reasoning ... [more ▼]

Classical higher-order logic, when utilized as a meta-logic in which various other (classical and non-classical) logics can be shallowly embedded, is well suited for realising a universal logic reasoning approach. Universal logic reasoning in turn, as envisioned already by Leibniz, may support the rigorous formalisation and deep logical analysis of rational arguments within machines. A respective universal logic reasoning framework is described and a range of exemplary applications are discussed. In the future, universal logic reasoning in combination with appropriate, controlled forms of rational argumentation may serve as a communication layer between humans and intelligent machines. [less ▲]

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See detailWhat makes Data Science different? A discussion involving Statistics2.0 and Computational Sciences
Ley, Christophe; Bordas, Stéphane UL

E-print/Working paper (2017)

Data Science is today one of the main buzzwords be it in business, industrial or academic settings. Machine learning, experimental design, data-driven modelling are all, undoubtedly, rising disciplines if ... [more ▼]

Data Science is today one of the main buzzwords be it in business, industrial or academic settings. Machine learning, experimental design, data-driven modelling are all, undoubtedly, rising disciplines if one goes by the soaring number of research papers and patents appearing each year. The prospect of becoming a ``Data Scientist'' appeals to many. A discussion panel organised as part of the European Data Science Conference (European Association for Data Science (EuADS)) asked the question: ``What makes Data Science different?'' In this paper we give our own, personal and multi-facetted view on this question, from an engineering and a statistics perspective. In particular, we compare Data Science to Statistics and discuss the connection between Data Science and Computational Science. [less ▲]

Detailed reference viewed: 983 (36 UL)
See detailPopulation ageing [glossary]
Chiocchetti, Paolo UL

E-print/Working paper (2017)

Population ageing is a major trend in contemporary European societies. A consequence of welcome shifts in life expectancy and fertility, it nevertheless entails important challenges for the adequacy ... [more ▼]

Population ageing is a major trend in contemporary European societies. A consequence of welcome shifts in life expectancy and fertility, it nevertheless entails important challenges for the adequacy, sustainability, and competitiveness of social and economic systems. [less ▲]

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See detailTempered subanalytic topology on algebraic varieties
Petit, François UL

E-print/Working paper (2017)

On a smooth complex algebraic variety, we build the tempered subanalytic and Stein tempered subanalytic sites. We construct the sheaf of holomorphic functions tempered at infinity over these sites and ... [more ▼]

On a smooth complex algebraic variety, we build the tempered subanalytic and Stein tempered subanalytic sites. We construct the sheaf of holomorphic functions tempered at infinity over these sites and study their relations with the sheaf of regular functions, proving in particular that these sheaves are isomorphic on Zariski open subsets. We show that these data allow to define the functors of tempered and Stein tempered analytifications. We study the relations between these two functors and the usual analytification functor. We also obtain algebraization results in the non-proper case and flatness results. [less ▲]

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Peer Reviewed
See detailThe maximum number of systoles for genus two Riemann surfaces with abelian differentials
Judge, Chris; Parlier, Hugo UL

E-print/Working paper (2017)

This article explores the length and number of systoles associated to holomorphic $1$-forms on surfaces. In particular, we show that up to homotopy, there are at most $10$ systolic loops on such a genus ... [more ▼]

This article explores the length and number of systoles associated to holomorphic $1$-forms on surfaces. In particular, we show that up to homotopy, there are at most $10$ systolic loops on such a genus two surface and that the bound is realized by a unique translation surface up to homothety. We also provide sharp upper bounds on the the number of homotopy classes of systoles for a holomorphic $1$-form with a single zero in terms of the genus. [less ▲]

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See detailMigration, Labor Tasks and Production Structure in Europe
Joxhe, Majlinda UL; Borelli, Stefania; Giuseppe, De Arcangelis

E-print/Working paper (2017)

This paper assesses the effect of the immigration on the production structure in a selection of European countries in 2001-2009 with a task-based approach. The inflow of immigrants represents an increase ... [more ▼]

This paper assesses the effect of the immigration on the production structure in a selection of European countries in 2001-2009 with a task-based approach. The inflow of immigrants represents an increase in the relative supply of manual-physical (or simple) tasks, hence favoring simple-task intensive sectors. We use a new OECD dataset, PIAAC, to calculate the index of simple-task intensity at the country-industry level. The analysis confirms that the increase in migration stocks caused a positive impact on the value added of sectors that use more intensively simple tasks. These effects are more intense when considering countries as Italy and Spain characterized by a recent, rapid and intense inflow of migrants. Endogeneity issues are discussed and instruments based on a gravity approach are used in estimation. [less ▲]

Detailed reference viewed: 73 (7 UL)
See detailImages of Galois representations in mod p Hecke algebras
Amoros Carafi, Laia UL

E-print/Working paper (2017)

Detailed reference viewed: 56 (3 UL)
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See detailC’était extrêmement violent» Il y a 100 ans, la révolution de Février a provoqué la fin de l’Empire russe
Paravantis, Spero UL

E-print/Working paper (2017)

La révolution de Février, qui s'est déroulée du 8 mars (23 février) 1917 au 13 mars (28 février) 1917, marque le début de la révolution russe de 1917. Elle force l'abdication du tsar Nicolas II et ... [more ▼]

La révolution de Février, qui s'est déroulée du 8 mars (23 février) 1917 au 13 mars (28 février) 1917, marque le début de la révolution russe de 1917. Elle force l'abdication du tsar Nicolas II et provoque la fin de l'Empire russe. Un gouvernement provisoire dirige, mais la même année, la révolution d'Octobre met au pouvoir des bolcheviks et permet la création de l'Union des républiques socialistes soviétiques (URSS). Le chercheur au «Centre for Contemporary and Digital History» à l’Université du Luxembourg, Dr. Spero S.Z. Paravantis nous détaille ce chapitre de l’histoire. [less ▲]

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See detailWohlbefinden von Arbeitnehmern in Luxemburg
Sischka, Philipp UL; Steffgen, Georges UL

E-print/Working paper (2017)

Vergleicht man die Teilnehmer der Quality of Work Index Luxembourg Umfrage mit anderen europäischen Arbeitnehmern, zeigen die Teilnehmer aus Luxemburg im Durchschnitt ein geringeres Wohlbefinden ... [more ▼]

Vergleicht man die Teilnehmer der Quality of Work Index Luxembourg Umfrage mit anderen europäischen Arbeitnehmern, zeigen die Teilnehmer aus Luxemburg im Durchschnitt ein geringeres Wohlbefinden. Insbesondere jüngere Arbeitnehmer weisen ein tendenziell geringeres Wohlbefinden auf. Differenziert man die Arbeitnehmer nach Berufsgruppen, zeigen Manager und Führungskräfte, Arbeitnehmer in Dienstleistungsberufen sowie Hilfsarbeitskräfte das höchste Wohlbefinden. Arbeitnehmer mit geringeren faktischen Wochenstundenzahlen sowie Arbeitnehmer, die in kleinen Betrieben (1-4 Beschäftigte) arbeiten, berichten über ein höheres Wohlbefinden. Das Wohlbefinden ist hierbei nachweislich mit unterschiedlichen Arbeitsbedingungen assoziiert. So weisen Arbeitnehmer, je höher ihre Partizipation, ihre Rollenklarheit bei der Arbeit sowie ihre Arbeitsplatzsicherheit ist umso ein höheres Wohlbefinden auf. Das Wohlbefinden ist außerdem positiv mit Arbeitszufriedenheit, wahrgenommenem Respekt bei der Arbeit und negativ mit Stress und Burnout korreliert. [less ▲]

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See detailHow did the ECB become a fully-fledged central bank of the eurozone?
Gren, Jakub UL

E-print/Working paper (2017)

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See detailReal-time Error Control for Surgical Simulation
Bui, Huu Phuoc UL; Tomar, Satyendra UL; Bordas, Stéphane UL

E-print/Working paper (2017)

Real-time simulations are becoming increasingly common for various applications, from geometric design to medical simulation. Two of the main factors concurrently involved in defining the accuracy of ... [more ▼]

Real-time simulations are becoming increasingly common for various applications, from geometric design to medical simulation. Two of the main factors concurrently involved in defining the accuracy of surgical simulations are: the modeling error and the discretization error. Most work in the area has been looking at the above sources of error as a compounded, lumped, overall error. Little or no work has been done to discriminate between modeling error (e.g. needle-tissue interaction, choice of constitutive models) and discretization error (use of approximation methods like FEM). However, it is impossible to validate the complete surgical simulation approach and, more importantly, to understand the sources of error, without evaluating both the discretization error and the modeling error. Our objective is thus to devise a robust and fast approach to measure the discretization error via a posteriori error estimates, which are then used for local remeshing in surgical simulations. To ensure that the approach can be used in clinical practice, the method should be robust enough to deal, as realistically as possible, with the interaction of surgical tools with the organ, and fast enough for real-time simulations. The approach should also lead to an improved convergence so that an economical mesh is obtained at each time step. The final goal is to achieve optimal convergence and the most economical mesh, which will be studied in our future work. [less ▲]

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See detailEvaluating How Child Allowances and Daycare Subsidies Affect Fertility
Goldstein, Joshua R.; Koulovatianos, Christos UL; Li, Jian UL et al

E-print/Working paper (2017)

We compare the cost effectiveness of two pronatalist policies: (a) child allowances; and (b) daycare subsidies. We pay special attention to estimating how intended fertility (fertility before children are ... [more ▼]

We compare the cost effectiveness of two pronatalist policies: (a) child allowances; and (b) daycare subsidies. We pay special attention to estimating how intended fertility (fertility before children are born) responds to these policies. We use two evaluation tools: (i) a dynamic model on fertility, labor supply, outsourced childcare time, parental time, asset accumulation and consumption; and (ii) randomized vignette-survey policy experiments. We implement both tools in the United States and Germany, finding consistent evidence that daycare subsidies are more cost effective. Nevertheless, the required public expenditure to increase fertility to the replacement level might be viewed as prohibitively high. [less ▲]

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See detailPopulism [glossary]
Chiocchetti, Paolo UL

E-print/Working paper (2017)

A chameleonic concept, populism can be defined as an ideology, a communication style, a political strategy, or a misguided category. Its key elements are a positive appreciation of people, a negative view ... [more ▼]

A chameleonic concept, populism can be defined as an ideology, a communication style, a political strategy, or a misguided category. Its key elements are a positive appreciation of people, a negative view of the elite, and the exaltation of untrammeled popular sovereignty against representative democracy and liberal constitutionalism. The fortune of the term, despite its theoretical and practical drawbacks, is the reflection of intrinsic antinomies of modern democracy and of a growing popular dissatisfaction toward the performance of representative governments and institutions. [less ▲]

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See detailAnalysis of the NORX Core Permutation
Biryukov, Alex UL; Udovenko, Aleksei UL; Velichkov, Vesselin UL

E-print/Working paper (2017)

NORX is one of the fifteen authenticated encryption algorithms that have reached the third round of the CAESAR competition. NORX is built using the sponge-based Monkey Duplex construction. In this note we ... [more ▼]

NORX is one of the fifteen authenticated encryption algorithms that have reached the third round of the CAESAR competition. NORX is built using the sponge-based Monkey Duplex construction. In this note we analyze the core permutation F. We show that it has rotational symmetries on different structure levels. This yields simple distinguishing properties for the permutation, which propagate with very high probability or even probability one. We also investigate differential symmetries in NORX at the word level. A new type of truncated differentials called symmetric truncated differentials (STD) is proposed. It is shown that, under the Markov assumption, up to 2.125 rounds of the F function of NORX32 and NORX64 can be distinguished using STD. Finally, we note that our analysis covers only the permutation F and does not immediately threaten the security claims of the designers. [less ▲]

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See detailInstitutional Determinants of Early Job Insecurity in Nine European Countries: Country Report Switzerland
Imdorf, Christian; Shi, Lulu P.; Helbling, Laura et al

E-print/Working paper (2017)

An overview of institutional determinants of early job insecurity in Switzerland.

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See detailChromatic numbers for the hyperbolic plane and discrete analogs
Parlier, Hugo UL; Petit, Camille

E-print/Working paper (2017)

We study colorings of the hyperbolic plane, analogously to the Hadwiger-Nelson problem for the Euclidean plane. The idea is to color points using the minimum number of colors such that no two points at ... [more ▼]

We study colorings of the hyperbolic plane, analogously to the Hadwiger-Nelson problem for the Euclidean plane. The idea is to color points using the minimum number of colors such that no two points at distance exactly $d$ are of the same color. The problem depends on $d$ and, following a strategy of Kloeckner, we show linear upper bounds on the necessary number of colors. In parallel, we study the same problem on $q$-regular trees and show analogous results. For both settings, we also consider a variant which consists in replacing $d$ with an interval of distances. [less ▲]

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See detailQuantum moment maps and retracts for bounded symmetric domains
Korvers, Stéphane UL

E-print/Working paper (2017)

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See detailWealth accumulation over the life course. The role of disadvantages across the employment history
Ponomarenko, Valentina UL

E-print/Working paper (2017)

In this study wealth is employed as an often neglected but highly stratified well-being measure in sociology. I relate the employment history and especially the accumulating disadvantages like ... [more ▼]

In this study wealth is employed as an often neglected but highly stratified well-being measure in sociology. I relate the employment history and especially the accumulating disadvantages like nonemployment and lower occupations to wealth in old age. In particular, I am interested in determining whether an adverse employment history prevents wealth accumulation and which factors influence wealth accumulation across the life course. I use comparative data from the Survey of Health, Ageing and Retirement and combine it with the retrospective panel SHARELIFE to retrieve information about the complete employment history. The relevance of wealth varies significantly across households and in the wider national context. Hence, a contextual perspective is included to account for the difference in wealth rates and wealth inequality in the European countries. The results show that cumulative nonemployment and employment in lower occupations has significant disadvantages for wealth accumulation in old age. However, large differences for men and women persist. Particularly, the household composition and household factors are decisive in the effectuality of these disadvantages. The relation of life course employment and especially disadvantages to accumulated wealth in old aged is stronger in conservative countries than in other welfare regimes. [less ▲]

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See detailIs gender in the eye of the beholder? Identifying cultural attitudes with art auction prices
Kräussl, Roman UL; Adams, Renée; Navone, Marco et al

E-print/Working paper (2017)

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See detailHochbegabte: eine besondere Minderheit?
Baudson, Tanja Gabriele UL

E-print/Working paper (2017)

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