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See detailAdventskalender, Tag 15: Gedanken und Wünsche für Hochbegabte.
Baudson, Tanja Gabriele UL

E-print/Working paper (2016)

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See detailLearning Tuple Probabilities
Dylla, Maximilian; Theobald, Martin UL

E-print/Working paper (2016)

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See detailDistributed Processing of Generalized Graph-Pattern Queries in SPARQL 1.1
Gurajada, Sairam; Theobald, Martin UL

E-print/Working paper (2016)

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See detailEndogenous Factor Income Distribution - When Piketty meets Romer -
Irmen, Andreas UL; Tabakovic, Amer UL

E-print/Working paper (2016)

We scrutinize Thomas Piketty’s (2014) theory concerning the relationship between an economy’s long-run growth rate, its capital-income ratio, and its factor income distribution put forth in his recent ... [more ▼]

We scrutinize Thomas Piketty’s (2014) theory concerning the relationship between an economy’s long-run growth rate, its capital-income ratio, and its factor income distribution put forth in his recent book Capital in the Twenty-First Century. We find that a smaller long-run growth rate may be associated with a smaller capital-income ratio. Hence, the key implication of Piketty’s Second Fundamental Law of Capitalism does not hold. In line with Piketty’s theory a smaller long-run growth rate may go together with a greater capital share. However, the mechanics behind this result are the opposite of what Piketty suggests. Our findings obtain in variants of Romer’s (1990) seminal model of endogenous technological change. Here, both the economy’s savings rate and its growth rate are endogenous variables whereas in Piketty’s theory they are both exogenous parameters. Including demographic growth in the spirit of Jones (1995) shows that a smaller growth rate of the economy may imply a lower capital share contradicting a central claim in Piketty’s book. [less ▲]

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See detailAdventskalender, Tag 6: Gedanken und Wünsche für Hochbegabte.
Baudson, Tanja Gabriele UL

E-print/Working paper (2016)

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See detailDifferential Calculus on Z_2^n Supermanifolds
Covolo, Tiffany; Kwok, Stephen UL; Poncin, Norbert UL

E-print/Working paper (2016)

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See detailpopulation Aging and Inventive Activity
Irmen, Andreas UL; Litina, Anastasia UL

E-print/Working paper (2016)

This research empirically establishes and theoretically motivates the hypothesis that population aging has a hump-shaped effect on inventive activity. We estimate this hump-shaped relationship in a panel ... [more ▼]

This research empirically establishes and theoretically motivates the hypothesis that population aging has a hump-shaped effect on inventive activity. We estimate this hump-shaped relationship in a panel of 33 OECD countries over the period 1960-2012. The increasing part of the hump captures the awareness that population aging requires inventive activity to guarantee current and future standards of living. The decreasing part reflects the tendency of aging societies to lose dynamism and the willingness to take risks. Policy-wise our analysis suggests that raising the awareness of individuals about the consequences of population aging may facilitate the adoption of strategies and policies encouraging inventive activity and economic growth. [less ▲]

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See detailWavelet Dynamic Conditional Correlation GARCH model : WDCC-GARCH
Nsaoudi, Ange; Terraza, Virginie UL

E-print/Working paper (2016)

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See detailIntegration on colored supermanifolds
Grabowski, Janusz; Kwok, Stephen UL; Poncin, Norbert UL

E-print/Working paper (2016)

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See detailModuli stacks of algebraic structures and deformation theory
Yalin, Sinan UL

E-print/Working paper (2016)

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See detailAn observation of circular RNAs in bacterial RNA-seq data
Innocenti, Nicolas; Nguyen, Hoang-Son; Fouquier d'Hérouël, Aymeric UL et al

E-print/Working paper (2016)

Circular RNAs (circRNAs) are a class of RNA with an important role in micro RNA (miRNA) regulation recently discovered in Human and various other eukaryotes as well as in archaea. Here, we have analyzed ... [more ▼]

Circular RNAs (circRNAs) are a class of RNA with an important role in micro RNA (miRNA) regulation recently discovered in Human and various other eukaryotes as well as in archaea. Here, we have analyzed RNA-seq data obtained from Enterococcus faecalis and Escherichia coli in a way similar to previous studies performed on eukaryotes. We report observations of circRNAs in RNA-seq data that are reproducible across multiple experiments performed with different protocols or growth conditions. [less ▲]

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See detailAdventskalender, Tag 11: Gedanken und Wünsche für Hochbegabte.
Baudson, Tanja Gabriele UL

E-print/Working paper (2016)

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See detailAdventskalender, Tag 4: Gedanken und Wünsche für Hochbegabte.
Baudson, Tanja Gabriele UL

E-print/Working paper (2016)

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See detailAdventskalender, Tag 22: Gedanken und Wünsche für Hochbegabte.
Baudson, Tanja Gabriele UL

E-print/Working paper (2016)

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See detailAdventskalender, Tag 7: Gedanken und Wünsche für Hochbegabte.
Baudson, Tanja Gabriele UL

E-print/Working paper (2016)

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See detailThe EU-Turkey Statement: A Treaty That Violates Democracy
Gatti, Mauro UL

E-print/Working paper (2016)

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See detailBorders : conceptual framework
Roelens, Nathalie UL

E-print/Working paper (2016)

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See detailBorderscape as an Interdisciplinary Concept - Compte rendu du colloque
Jeusette, Julien UL

E-print/Working paper (2016)

Detailed reference viewed: 86 (6 UL)
See detailAdventskalender, Tag 12: Gedanken und Wünsche für Hochbegabte.
Baudson, Tanja Gabriele UL

E-print/Working paper (2016)

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See detailUntraceable VoIP Communication based on DC-nets
Franck, Christian UL; Sorger, Ulrich UL

E-print/Working paper (2016)

Untraceable communication is about hiding the identity of the sender or the recipient of a message. Currently most systems used in practice (e.g., TOR) rely on the principle that a message is routed via ... [more ▼]

Untraceable communication is about hiding the identity of the sender or the recipient of a message. Currently most systems used in practice (e.g., TOR) rely on the principle that a message is routed via several relays to obfuscate its path through the network. However, as this increases the end-to-end latency it is not ideal for applications like Voice-over-IP (VoIP) communication, where participants will notice annoying delays if the data does not arrive fast enough. We propose an approach based on the paradigm of Dining Cryptographer networks (DC-nets) that can be used to realize untraceable communication within small groups. The main features of our approach are low latency and resilience to packet-loss and fault packets sent by malicious players. We consider the special case of VoIP communication and propose techniques for a P2P implementation. We expose existing problems and sketch possible future large-scale systems composed of multiple groups. [less ▲]

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See detailPolitical Economics of Fiscal Consolidations and External Sovereign Accidents
Achury, Carolina; Koulovatianos, Christos UL; Tsoukalas, John

E-print/Working paper (2016)

As the recent chain of EU sovereign crises has demonstrated, after an unexpected massive rise to the debt GDP ratio, several EU countries manage to proceed with fiscal consolidation quickly and ... [more ▼]

As the recent chain of EU sovereign crises has demonstrated, after an unexpected massive rise to the debt GDP ratio, several EU countries manage to proceed with fiscal consolidation quickly and effectively, while other countries, notably Greece, proceed slowly, fueling Graccident and Grexit scenarios, even after generous rescue packages, involving debt haircuts and monitoring from official bodies. Here we recursively formulate a game among rent-seeking groups and propose that high debt-GDP ratios lead to predictable miscoordination among rent-seeking groups, unsustainable debt dynamics, and open the path to political accidents that foretell Graccident scenarios. Our analysis and application helps in under- standing the politico-economic sustainability of sovereign rescues, emphasizing the need for fiscal targets and possible debt haircuts. We provide a calibrated example that quantifies the threshold debt-GDP ratio at 137%, remarkably close to the target set for private sector involvement in the case of Greece. [less ▲]

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See detailMultiscale hedge ratio between the spot and future prices of carbon: Wavelet Based Approach
Nsouadi, Ange; Terraza, Virginie UL

E-print/Working paper (2016)

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See detailDie Karte des luxemburgisch-kurtrierischen Grenzverlaufs aus dem Jahr 1776 – Ein Meisterwerk der Kartographie des späten Ancien Régime und eine faszinierende Quelle für die Landesgeschichte
Uhrmacher, Martin UL

E-print/Working paper (2016)

Das Nationalarchiv hat drei außergewöhnliche Dokumente aus dem Jahr 1776 online gestellt. Hierbei handelt es sich um zwei sehr große Karten (7,1m x 2m ; 3,3m x 2,1m), die den Grenzverlauf zwischen ... [more ▼]

Das Nationalarchiv hat drei außergewöhnliche Dokumente aus dem Jahr 1776 online gestellt. Hierbei handelt es sich um zwei sehr große Karten (7,1m x 2m ; 3,3m x 2,1m), die den Grenzverlauf zwischen Luxemburg und dem Kurfürstentum Trier zeigen. Sie wurden vom Ingenieur Bergé, Oberleutnant der österreichischen Armee, gezeichnet und mit Hilfe des Fotografen Tom Lucas und des Musée Dräi Eechelen digitalisiert. Hinzu kommt ein historisches Dokument von 325 Seiten in dem die auf den Karten abgebildete Grenze in Frage gestellt wird. Beide Karten sind aufgrund ihrer Größe nur schwer einsehbar, stellen aber eine wichtige Quelle für die Geschichte Luxemburgs dar und sind reich an Informationen, Details und Farben. Martin Uhrmacher, Dozent und Forscher an der Universität Luxemburg und Experte auf dem Gebiet der historischen Kartographie, hat beide Karten in diesem Beitrag ausführlich analysiert. [less ▲]

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See detailWeak poincaré inequality for convolution probability measures
Cheng, Li Juan UL; Zhang, Shao Qin

E-print/Working paper (2016)

In this article, weak Poincaré inequalities are established for convolution measures by using Lyapunov conditions. As applications, these results are further applied to some explicit cases.

Detailed reference viewed: 74 (12 UL)
See detailDecolonisation: geopolitical issues and impact on the European integration process
Mouton, Victoria UL; Gabellini, Marco UL; et al.

E-print/Working paper (2016)

The ePublication ‘Decolonisation: geopolitical issues and impact on the European integration process’ explores the key moments in the disintegration of the European colonial empires, with a particular ... [more ▼]

The ePublication ‘Decolonisation: geopolitical issues and impact on the European integration process’ explores the key moments in the disintegration of the European colonial empires, with a particular emphasis on French and British decolonisation, and looks at how this process of decolonisation influenced the European integration process. The ePublication begins by outlining the main stages in decolonisation after 1945, illustrated by specific examples. The Cold War and the increasing international condemnation of colonialism provided conditions that were ripe for indigenous peoples to gradually loosen the ties binding them to a Europe that was drained and in ruins following the Second World War. At the same time, the creation of the European Community forced the European powers to reconcile their overseas and European policies. The emergence of Third-World countries in the international arena changed relations between Europe and its (former) colonies and raised the question of a Community development aid policy. This ePublication therefore goes on to examine the debates that led in 1957 to the association of the overseas countries and territories (OCTs) with the European Economic Community (EEC), then to the signing of the Yaoundé Convention in 1963 and the Lomé Convention in 1975. A particular strength of the ePublication is the compilation and analysis of a rich, varied selection of more than 700 resources, including archive documents, press articles, correspondence, extracts from memoirs, photos and cartoons. [less ▲]

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See detailModel spaces in sub-Riemannian geometry
Grong, Erlend UL

E-print/Working paper (2016)

We consider sub-Riemannian spaces admitting an isometry group that is maximal in the sense that any linear isometry of the horizontal tangent spaces is realized by a global isometry. We will show that ... [more ▼]

We consider sub-Riemannian spaces admitting an isometry group that is maximal in the sense that any linear isometry of the horizontal tangent spaces is realized by a global isometry. We will show that these spaces have a canonical partial connection defined on their horizontal bundle. However, unlike the Riemannian case, such spaces are not uniquely determined by their curvature and their metric tangent cone. Furthermore, the number of invariants needed to determine model spaces with the same tangent cone is in general greater than one. [less ▲]

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See detailClassification of universal formality maps for quantizations of Lie bialgebras
Merkulov, Sergei UL; Willwacher, Thomas

E-print/Working paper (2016)

We introduce an endofunctor D in the category of augmented props with the property that for any representation of a prop P in a vector space V the associated prop DP admits an induced representation on ... [more ▼]

We introduce an endofunctor D in the category of augmented props with the property that for any representation of a prop P in a vector space V the associated prop DP admits an induced representation on the graded commutative tensor algebra S(V) given in terms of polydifferential operators. Applying this functor to the prop LieB of Lie bialgebras we show that universal formality maps for quantizations of Lie bialgebras are in in 1-1 correspondence with prop morphisms from the minimal resolution AssB_infty of the prop of associative bialgebras to the polydifferential prop DLieB_infty satisfying certain boundary conditions. We prove that the set of such formality morphisms (having an extra property of being Lie connected) is non-empty. The latter result is used in turn to give a short proof of the formality theorem for universal quantizations of arbitrary Lie bialgebras which says that for any Drinfeld associator there is an associated Lie_infty quasi-isomorphism between the Lie_infty algebras controlling, respectively, deformations of the standard bialgebra structure in S(V) and deformations of any given Lie bialgebra structure in V. We study the deformation complex of an arbitrary universal formality morphism and show that it is quasi-isomorphic (up to one class corresponding to the standard rescaling automorphism of the properad LieB) to the oriented graph complex GC or 3 studied earlier in \cite{Wi2}. This result gives a complete classification of the set of gauge equivalence classes of universal Lie connected formality maps --- it is a torsor over the Grothendieck-Teichm\"uller group GRT and can hence can be identified with the set of Drinfeld associators. [less ▲]

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See detailAdventskalender, Tag 8: Gedanken und Wünsche für Hochbegabte.
Baudson, Tanja Gabriele UL

E-print/Working paper (2016)

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See detailOptimal Income Taxation for the Alleviation of Working-Poverty When Domestic Work is Rewarded
Chen, Xi; Salagean, Ioana; Zou, Benteng UL

E-print/Working paper (2016)

The increase in income needed for working households to escape relative poverty may be achieved either by households supplying more hours of paid work on the labor market, or by policy makers adjusting ... [more ▼]

The increase in income needed for working households to escape relative poverty may be achieved either by households supplying more hours of paid work on the labor market, or by policy makers adjusting income taxation, minimum wages and social transfers targeted at working households. While past work has given considerable attention to the latter policy instruments, theoretical work on how income taxation could minimize working-poverty is scarce. Our study aims to fill this gap. Unlike the traditional optimal income taxation literature, which considers that households allocate time only between consumption and leisure, we explicitly model households’ decisions as including domestic work, which is a social contribution and should be rewarded. This new framework highlights (i) the importance of emphasizing the difference between domestic work and real leisure and, (ii) the policy implications of non-market time allocation. [less ▲]

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See detailGreen Consumption and relative preferences in an international ologopoly
Zanaj, Skerdilajda UL; Tarola, Ornella; Ceccantoni, Giulia

E-print/Working paper (2016)

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See detailAdventskalender, Tag 5: Gedanken und Wünsche für Hochbegabte.
Baudson, Tanja Gabriele UL

E-print/Working paper (2016)

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See detailPoisson cohomology of holomorphic toric Poisson manifolds
Hong, Wei UL

E-print/Working paper (2016)

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See detailA global description of the fine Simpson moduli space of 1-dimensional sheaves supported on plane quartics
Iena, Oleksandr UL

E-print/Working paper (2016)

A global description of the fine Simpson moduli spaces of 1-dimensional sheaves supported on plane quartics is given: we describe the gluing of the Brill-Noether loci described by Drézet and Maican and ... [more ▼]

A global description of the fine Simpson moduli spaces of 1-dimensional sheaves supported on plane quartics is given: we describe the gluing of the Brill-Noether loci described by Drézet and Maican and show that the Simpson moduli space M=M_{4m±1}(P_2) is a blow-down of a blow-up of a projective bundle over a smooth moduli space of Kronecker modules. An easy computation of the Poincaré polynomial of M is presented. [less ▲]

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See detailTurkish Immigration Politics and the Syrian Refugee Crisis
Hoffmann, Sophia; Samuk, Sahizer UL

E-print/Working paper (2016)

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See detailAdventskalender, Tag 19: Gedanken und Wünsche für Hochbegabte.
Baudson, Tanja Gabriele UL

E-print/Working paper (2016)

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See detailIncome Effects and Vertical Differentiation in International Trade
Picard, Pierre M UL; Tampieri, Alessandro

E-print/Working paper (2016)

We analyse a trade model with non-homothetic preferences and different quality ver- sions of each product. Income effects drive the quality composition of consumption, pro- duction and trade flows. We ... [more ▼]

We analyse a trade model with non-homothetic preferences and different quality ver- sions of each product. Income effects drive the quality composition of consumption, pro- duction and trade flows. We show that a rise in local population fosters local asymmetric specialization in high-quality production and exports while it harms low income groups. By contrast, an increase in local productivity may generate specialization in high quality production, which in turn may trigger an immiserizing growth process. Weaker compa- rative advantages induce firm to move and make a local productivity improvement more likely to increase production of higher quality goods everywhere. [less ▲]

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See detailTax havens compliance with international standards: a temporal perspective
Zanaj, Skerdilajda UL; Pieretti, Patrice UL; pulina, giuseppe

E-print/Working paper (2016)

Detailed reference viewed: 65 (1 UL)
See detailAttractors in spacetimes and time functions
Monclair, Daniel UL

E-print/Working paper (2016)

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See detailHow to discretize the differential forms on the interval
Bandiera, Ruggero; Schätz, Florian UL

E-print/Working paper (2016)

We provide explicit quasi-isomorphisms between the following three algebraic structures associated to the unit interval: i) the commutative dg algebra of differential forms, ii) the non-commutative dg ... [more ▼]

We provide explicit quasi-isomorphisms between the following three algebraic structures associated to the unit interval: i) the commutative dg algebra of differential forms, ii) the non-commutative dg algebra of simplicial cochains and iii) the Whitney forms, equipped with a homotopy commutative and homotopy associative, i.e. C-∞, algebra structure. Our main interest lies in a natural `discretization' C-∞ quasi-isomorphism φ from differential forms to Whitney forms. We establish a uniqueness result that implies that φ coincides with the morphism from homotopy transfer, and obtain several explicit formulas for φ, all of which are related to the Magnus expansion. In particular, we recover combinatorial formulas for the Magnus expansion due to Mielnik and Plebanski. [less ▲]

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See detailEurope’s Center of Science: Science Productivity in Belgium, France, Germany, and Luxembourg
Powell, Justin J W UL; Dusdal, Jennifer UL

E-print/Working paper (2016)

European countries have increasingly invested in higher education and science systems, leading to rising numbers of scholars and scientists, considerable infrastructure development, and dense cross ... [more ▼]

European countries have increasingly invested in higher education and science systems, leading to rising numbers of scholars and scientists, considerable infrastructure development, and dense cross-cultural networks and collaboration. The result: significant growth in scientific output and productivity in science, technology, engineering and math (STEM) fields. For four EU member states in Western Europe of different size and institutionalization pathways of science, we assess the development and current state of universities and research institutes, and the resulting science output. We measure output in peer-reviewed research articles collected in Thomson Reuters’ Science Citation Index Expanded (SCIE). Based on a comprehensive historical database, this comparison uncovers both stable and dynamic patterns of productivity from 1975 to 2010 in Germany, France, Belgium, and Luxembourg.[1] This emphasizes different institutionalization pathways that created the conditions necessary for continuous, but varying growth in scientific productivity in the European center of global science. Today, these countries invest considerably in research and development (R&D) and in higher education, the smaller ones doing so through a single national research university (Luxembourg), or a set of strong research universities in different regions (Belgium’s language communities of Flanders and Wallonia). The two larger countries (France and Germany) maintain differentiated systems of universities—of varying size and prestige—and extra-university research institutes that are connected in large umbrella associations or coordinated by government agencies. Rising science productivity reflects considerable state investment, yet the impact of any individual scientific article remains difficult to measure. [less ▲]

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See detailMalaise in the Western Middle Classes
Chauvel, Louis UL; Hartung, Anne UL

E-print/Working paper (2016)

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See detailSecurity Analysis of the Drone Communication Protocol: Fuzzing the MAVLink protocol
Domin, Karel; Symeonidis, Iraklis UL; Marin, Eduard

E-print/Working paper (2016)

The MAVLink protocol, used for bidirectional communication between a drone and a ground control station, will soon become a worldwide standard. The protocol has been the subject of research many times ... [more ▼]

The MAVLink protocol, used for bidirectional communication between a drone and a ground control station, will soon become a worldwide standard. The protocol has been the subject of research many times before. Through this paper, we introduce the method of fuzzing as a complementing technique to the other research, to find vulnerabilities that have not been found before by different techniques. The goal is to identify possible vulnerabilities in the protocol implementation in order to make it more secure. [less ▲]

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See detailKrichever-Novikov type algebras and Wess-Zumino-Witten models
Schlichenmaier, Martin UL

E-print/Working paper (2015)

Krichever--Novikov type algebras are generalizations of the Witt, Virasoro, affine Lie algebras, and their relatives to Riemann surfaces of arbitrary genus and/or the multi-point situation. They play a ... [more ▼]

Krichever--Novikov type algebras are generalizations of the Witt, Virasoro, affine Lie algebras, and their relatives to Riemann surfaces of arbitrary genus and/or the multi-point situation. They play a very important role in the context of quantization of Conformal Field Theory. In this review we give the most important results about their structure, almost-grading and central extensions. Furthermore, we explain how they are used in the context of Wess--Zumino--Novikov--Witten models, respectively Knizhnik-Zamolodchikov connections. There they play a role as gauge algebras, as tangent directions to the moduli spaces, and as Sugawara operators. [less ▲]

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See detailOn four Koszul-Tate resolutions
Pistalo, Damjan UL; Poncin, Norbert UL

E-print/Working paper (2015)

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See detailValuing American options using fast recursive projections
Cosma, Antonio UL; Galluccio, Stefano; Pederzoli, Paola et al

E-print/Working paper (2015)

We introduce a fast and widely applicable numerical pricing method that uses recursive projections. We characterize its convergence speed. We find that the early exercise boundary of an American call ... [more ▼]

We introduce a fast and widely applicable numerical pricing method that uses recursive projections. We characterize its convergence speed. We find that the early exercise boundary of an American call option on a discrete dividend paying stock is higher under the Merton and Heston models than under the Black-Scholes model, as opposed to the continuous dividend case. A large database of call options on stocks with quarterly dividends shows that adding stochastic volatility and jumps to the Black-Scholes benchmark reduces the amount foregone by call holders failing to optimally exercise by 25%. Transaction fees cannot fully explain the suboptimal behavior. [less ▲]

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See detailAuswertung der Selbstevaluation des IDENT2-Projekts (2011-2014)
Reckinger, Rachel UL

E-print/Working paper (2015)

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See detailArbeitszufriedenheit der Arbeitnehmer in Luxemburg
Sischka, Philipp UL; Steffgen, Georges UL

E-print/Working paper (2015)

Die Arbeitszufriedenheit der Arbeitnehmer in Luxemburg hat sich von 2013 zu 2014 insgesamt verringert. Von diesem Rückgang waren insbesondere Arbeitnehmer in der Altersklasse der 45-54 Jährigen ... [more ▼]

Die Arbeitszufriedenheit der Arbeitnehmer in Luxemburg hat sich von 2013 zu 2014 insgesamt verringert. Von diesem Rückgang waren insbesondere Arbeitnehmer in der Altersklasse der 45-54 Jährigen, Arbeitnehmer mit portugiesischer Nationalität sowie in Belgien wohnhafte Arbeitnehmer betroffen. Die Veränderungen von 2014 zu 2015 fallen insgesamt moderater aus. Innerhalb dieses Zeitraums nimmt die Arbeitszufriedenheit der 16-24 Jährigen jedoch relativ stark ab. Arbeitnehmer mit portugiesischer Nationalität steigen in ihrer Arbeitszufriedenheit dagegen wieder an. Zu keinem der drei Erhebungszeitpunkte sind hinsichtlich der Arbeitszufriedenheit Unterschiede zwischen Männern und Frauen sowie zwischen Arbeitnehmern in Vollzeit und in Teilzeit festzustellen. Insgesamt berichten Manager und Führungskräfte sowie Arbeitnehmer in akademischen Berufen im Jahr 2015 über die höchste Arbeitszufriedenheit, dagegen Arbeitnehmer, die Anlagen und Maschinen bedienen sowie Arbeitnehmer, die in Land- und Forstwirtschaft beschäftigt sind, über die geringste Arbeitszufriedenheit. [less ▲]

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See detailLet's Talk Business: The Economic Impact of Brexit
Herzog, Mechthild UL

E-print/Working paper (2015)

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See detailVictimization and Safety in Luxembourg - Findings of the "Enquête sur la sécurité 2013"
Heinz, Andreas UL; Steffgen, Georges UL; Willems, Helmut UL

E-print/Working paper (2015)

Cette publication présente les principaux résultats de « l'Enquête sur la sécurité 2013 » réalisée au Luxembourg par le STATEC et l'Université du Luxembourg/INSIDE. Les principaux objectifs de l’enquête ... [more ▼]

Cette publication présente les principaux résultats de « l'Enquête sur la sécurité 2013 » réalisée au Luxembourg par le STATEC et l'Université du Luxembourg/INSIDE. Les principaux objectifs de l’enquête étaient de mesurer les taux de prévalence des délits de droit commun et de sonder les comportements relatifs à la délinquance et la sécurité. [less ▲]

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See detailProps of ribbon graphs, involutive Lie bialgebras and moduli spaces of curves M_g,n
Merkulov, Sergei UL; Willwacher, Thomas

E-print/Working paper (2015)

We establish a new and surprisingly strong link between two previously unrelated theories: the theory of moduli spaces of curves $\cM_{g,n}$ (which, according to Penner, is controlled by the ribbon graph ... [more ▼]

We establish a new and surprisingly strong link between two previously unrelated theories: the theory of moduli spaces of curves $\cM_{g,n}$ (which, according to Penner, is controlled by the ribbon graph complex) and the homotopy theory of $E_d$ operads (controlled by ordinary graph complexes with no ribbon structure, introduced first by Kontsevich). The link between the two goes through a new intermediate {\em stable}\, ribbon graph complex which has roots in the deformation theory of quantum $A_\infty$ algebras and the theory of Kontsevich compactifications of moduli spaces of curves $\overline{\cM}_{g,n}^K$. Using a new prop of ribbon graphs and the fact that it contains the prop of involutive Lie bialgebras as a subprop we find new algebraic structures on the classical ribbon graph complex computing $H^\bu(\cM_{g,n})$. We use them to prove Comparison Theorems, and in particular to construct a non-trivial map from the ordinary to the ribbon graph cohomology. On the technical side, we construct a functor $\f$ from the category of prop(erad)s to the category of operads. If a properad $\cP$ is in addition equipped with a map from the properad governing Lie bialgebras (or graded versions thereof), then we define a notion of $\cP$-``graph'' complex, of stable $\cP$-graph complex and a certain operad, that is in good cases an $E_d$ operad. In the ribbon case, this latter operad acts on the deformation complexes of any quantum $A_\infty$-algebra. We also prove that there is a highly non-trivial, in general, action of the Grothendieck-Teichm\"uller group $GRT_1$ on the space of so-called {\em non-commutative Poisson structures}\, on any vector space $W$ equipped with a degree $-1$ symplectic form (which interpolate between cyclic $A_\infty$ structures in $W$ and ordinary polynomial Poisson structures on $W$ as an affine space). [less ▲]

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See detailDesperately Seeking Small Worlds in Corporate Boards: International Evidence from Listed Firms
Hamadi, Malika; Heinen, Andreas; Jonard, Nicolas UL et al

E-print/Working paper (2015)

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See detailN point Virasoro algebras considered as Krichever-Novikov type algebras
Schlichenmaier, Martin UL

E-print/Working paper (2015)

We explain how the recently again discussed $N$-point Witt, Virasoro, and affine Lie algebras are genus zero examples of the multi-point versions of Krichever--Novikov type algebras as introduced and ... [more ▼]

We explain how the recently again discussed $N$-point Witt, Virasoro, and affine Lie algebras are genus zero examples of the multi-point versions of Krichever--Novikov type algebras as introduced and studied by Schlichenmaier. Using this more general point of view, useful structural insights and an easier access to calculations can be obtained. As example, explicit expressions for the three-point situation are given. This is a write-up of a talk presented at the Bialowieza meeting in 2015. Details can be found in a recent manuscript by the author. [less ▲]

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See detailThe Demand for Diversification in Incomplete Markets
Mehra, Rajnish UL; Wahal, Sunil; Xie, Daruo

E-print/Working paper (2015)

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See detailFinancing Patterns of European SMEs: An Empirical Taxonomy
Moritz, Alexandra; Block, Joern; Heinz, Andreas UL

E-print/Working paper (2015)

This EIF Working Paper takes a holistic approach to investigate SME financing patterns in Europe by performing a cluster analysis including 12,726 SMEs in 28 European countries. The results reveal that ... [more ▼]

This EIF Working Paper takes a holistic approach to investigate SME financing patterns in Europe by performing a cluster analysis including 12,726 SMEs in 28 European countries. The results reveal that SME financing in Europe is not homogenous but that different financing patterns exist. The cluster analysis identifies six distinct SME financing types: mixed-financed SMEs, state-subsidised SMEs, debt-financed SMEs, flexible-debt-financed SMEs, trade-financed SMEs and internally-financed SMEs. These SME financingtypes differ according to the number of financing instruments used and the combinations thereof. Furthermore, the SME financing types can be profiled according to their firm-, product-, industry- and country- specific characteristics. Our findings can support policy makers in assessing the impact of policy changes on SME financing and in designing financing programs tailored to the specific needs of SMEs. [less ▲]

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See detailInflation Aversion in the European Union: Exploring the Myth of a North-South Divide
Howarth, David UL; Rommerskirchen, Charlotte

E-print/Working paper (2015)

Our study seeks to prove that German Stability Culture is a myth. The concept is a core legitimizing element of economic policy discourse in Germany and used regularly to juxtapose Germany and northern ... [more ▼]

Our study seeks to prove that German Stability Culture is a myth. The concept is a core legitimizing element of economic policy discourse in Germany and used regularly to juxtapose Germany and northern Europe and the euro area periphery. Using Eurobarometer surveys we construct a measurement for Stability Culture which is based on the priority assigned to the fight against inflation. Our empirical analysis covers the 2002 to 2010 timespan and includes 27 European Union Member States. Our results show that the distinction between northern states with an allegedly strong and southern states with an allegedly weak Stability Culture is a myth. Controlling for actual inflation, we find that the northern Member States with an allegedly high Stability Culture are less concerned with price stability than the rest of the EU. [less ▲]

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See detailAssessing and Improving the Mutation Testing Practice of PIT
Laurent, Thomas; Ventresque, Anthony; Papadakis, Mike UL et al

E-print/Working paper (2015)

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See detailCentrality of regions in R&D networks: Conceptual clarifications and a new measure
Berge, Laurent UL; Wanzenböck, Iris; Scherngell, Thomas

E-print/Working paper (2015)

This paper aims at introducing a novel measure of regional centrality in the context of R&D networks. We first demonstrate some substantial problems of SNA-based centrality measures to cope with regional ... [more ▼]

This paper aims at introducing a novel measure of regional centrality in the context of R&D networks. We first demonstrate some substantial problems of SNA-based centrality measures to cope with regional R&D networks in a meaningful way. Then, we introduce a new measurement approach of regional network centrality based on the concept of inter-regional bridging paths (indirect connections at the regional level). We show that the formal definition of our regional bridging centrality measure can be expressed in terms of three simple components: the participation intensity of a region in inter-regional R&D collaborations, the relative outward orientation in terms of all established links and the diversification of R&D collaborations among partner regions. We illustrate the measure and its behaviour with respect to other conventional centrality measures by using the European co-patent network at the NUTS 2 level. [less ▲]

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See detailA Polyakov formula for sectors
Aldana Dominguez, Clara Lucia UL; Rowlett, Julie

E-print/Working paper (2015)

We consider finite area convex Euclidean circular sectors. We prove a variational Polyakov formula which shows how the zeta-regularized determinant of the Laplacian varies with respect to the opening ... [more ▼]

We consider finite area convex Euclidean circular sectors. We prove a variational Polyakov formula which shows how the zeta-regularized determinant of the Laplacian varies with respect to the opening angle. Varying the angle corresponds to a conformal deformation in the direction of a conformal factor with a logarithmic singularity at the corner. As an application of the method, we obtain an analogues Polyakov formula for a surface with one conical singularity. We compute the zeta-regularized determinant of rectangular domains of fixed area and prove that it is uniquely maximized by the square. [less ▲]

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See detailWeyl type quantization for some symplectic symmetric spaces
Korvers, Stéphane UL

E-print/Working paper (2015)

Detailed reference viewed: 19 (0 UL)
See detailAdelic openness without the Mumford-Tate conjecture
Hui, Chun Yin UL; Larsen, Michael

E-print/Working paper (2015)

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See detailOn rationality of certian type A Galois representations
Hui, Chun Yin UL

E-print/Working paper (2015)

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See detailOn the Distribution of Frobenius of Weight 2 Eigenforms with Quadratic Coefficient Field
Van Hirtum, Jasper UL

E-print/Working paper (2015)

In this article we present a heuristic model that describes the asymptotic behaviour of the number of primes p such that the p-th coefficient of a given eigenform is a rational integer. We treat the case ... [more ▼]

In this article we present a heuristic model that describes the asymptotic behaviour of the number of primes p such that the p-th coefficient of a given eigenform is a rational integer. We treat the case of a weight 2 eigenform with quadratic coefficient field without inner twists. Moreover we present numerical data which agrees with our model and the assumptions we made to obtain it. [less ▲]

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See detailRemittance and Migration Prospects for the Twenty-First Century
Machado Carneiro, Joël UL; Docquier, Frédéric

E-print/Working paper (2015)

Detailed reference viewed: 67 (13 UL)
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See detailAirport Congestion and Inefficiency in Slot Allocation
Picard, Pierre M UL; Tampieri, Alessandro UL; Wan, Xi

E-print/Working paper (2015)

This paper analyzes optimal slot allocation in the presence of airport congestion. We model peak and offpeak slots as vertically differentiated products, and congestion limits the number of peak slots ... [more ▼]

This paper analyzes optimal slot allocation in the presence of airport congestion. We model peak and offpeak slots as vertically differentiated products, and congestion limits the number of peak slots that the airport can allocate. Inefficiency emerges when the airport does not exploit all its slots. We show that for a private airport, inefficiency may arise if the airport is not too congested and the per-passenger fee is small enough, while with a public airport it does not emerge. Furthermore the airport, irrespective of its ownership, tends to give different slots to flights with same destination if the underlying market is a duopoly, and a single slot if the underlying market is served by a monopoly. [less ▲]

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See detailThe Comparative Political Economy of Basel III
Howarth, David UL; Quaglia, Lucia UL

E-print/Working paper (2015)

The Basel III Accord was the centerpiece of the international regulatory response to the global financial crisis, setting new capital requirements for internationally active banks. This paper explains the ... [more ▼]

The Basel III Accord was the centerpiece of the international regulatory response to the global financial crisis, setting new capital requirements for internationally active banks. This paper explains the divergent preferences on Basel III of national regulators in three countries that approximate what are frequently presented as distinct varieties of capitalism in Europe – Germany, the United Kingdom and France. It is argued that national regulators faced a ‘trilemma’ in setting capital requirements, having to prioritize among banking sector stability, the competitiveness of national banks and short to medium term economic growth. Different varieties of national financial system – specifically, banking system and different kinds of ‘banking champions’ – explain the different prioritization of objectives in the ‘trilemma’ and hence for the divergent preferences of national regulators on Basel III capital requirements. [less ▲]

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See detailThe Pessimism Factor: SEC EDGAR Form 10-K Textual Analysis and Stock Returns
Chouliaras, Andreas UL

E-print/Working paper (2015)

Detailed reference viewed: 88 (0 UL)
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See detail8pi-periodic Josephson effect in time-reversal invariant interacting Rashba nanowires
Pedder, Christopher UL; Meng, Tobias; Tiwari, Rakesh et al

E-print/Working paper (2015)

We investigate narrow quantum wires with strong Rashba spin-orbit coupling and electron-electron interactions. We show that virtual transitions between subbands lead to umklapp scattering which can open a ... [more ▼]

We investigate narrow quantum wires with strong Rashba spin-orbit coupling and electron-electron interactions. We show that virtual transitions between subbands lead to umklapp scattering which can open a partial gap in the spectrum even in the presence of time-reversal symmetry. Using the superconducting proximity effect to gap out the remaining modes, we show that the system can host zero-energy states at its edges, which are protected by time-reversal symmetry. We present the parameter regime in which these bound states will emerge. Similarly to Majorana bound states, they will produce a zero-bias peak in the differential conductance. In contrast to the Majorana fermions, however, their fourfold degeneracy leads to an 8π periodicity of the Josephson current due to tunneling of fractionalized excitations with charge e/2. [less ▲]

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See detailTriple-A rating? Juncker's vision for the EU's social policy scorecard
Herzog, Mechthild UL

E-print/Working paper (2015)

Detailed reference viewed: 37 (2 UL)
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See detailN-point Virasoro algebras are multi-point Krichever--Novikov type algebras
Schlichenmaier, Martin UL

E-print/Working paper (2015)

We show how the recently again discussed $N$-point Witt, Virasoro, and affine Lie algebras are genus zero examples of the multi-point versions of Krichever--Novikov type algebras as introduced and studied ... [more ▼]

We show how the recently again discussed $N$-point Witt, Virasoro, and affine Lie algebras are genus zero examples of the multi-point versions of Krichever--Novikov type algebras as introduced and studied by Schlichenmaier. Using this more general point of view, useful structural insights and an easier access to calculations can be obtained. The concept of almost-grading will yield information about triangular decompositions which are of importance in the theory of representations. As examples the algebra of functions, vector fields, differential operators, current algebras, affine Lie algebras, Lie superalgebras and their central extensions are studied. Very detailed calculations for the three-point case are given. [less ▲]

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See detailPension insecurity and well-being in Europe
Olivera Angulo, Javier UL; Ponomarenko, Valentina UL

E-print/Working paper (2015)

This paper studies pension insecurity in a sample of non-retired individuals aged 50 years or older from 18 European countries. We relate pension insecurity with the subjective expectations on the ... [more ▼]

This paper studies pension insecurity in a sample of non-retired individuals aged 50 years or older from 18 European countries. We relate pension insecurity with the subjective expectations on the probability that the government will reduce the pensions of the individual before retirement or will increase the statutory retirement age. We argue that changes in economic conditions and policy affect the formation of such probabilities, and through this, subjective wellbeing. In particular, we study the effects of pension insecurity on subjective wellbeing with pooled OLS models, regressions per quintiles and instrumental variables. We find a statistically significant, stable and negative association between pension insecurity and subjective wellbeing. The quintile regressions allow us to establish that pension insecurity is more salient for individuals who are poorer, who subjectively assess their life survival rate as low and who have higher cognitive abilities. [less ▲]

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See detailWell-being differences in old-age in Europe: the Active Ageing Index by cohorts
Olivera Angulo, Javier UL

E-print/Working paper (2015)

The goal of this paper is to study and explain the differences in wellbeing in old age across cohorts and countries in Europe. This is done with the replication of the Active Ageing Index for cohorts ... [more ▼]

The goal of this paper is to study and explain the differences in wellbeing in old age across cohorts and countries in Europe. This is done with the replication of the Active Ageing Index for cohorts formed by age group, sex and country for 2012. The analysis is performed with different model regressions at the cohort level and introducing macro variables at the country level. In general, there is a gap in active ageing in detriment of females which is larger in older cohorts. In addition, wealth, equity and pension settings of the country are important predictors for better active ageing. Finally, it is found that the Social-Democratic welfare regime (Nordic countries) with its set of strong redistributive policies, is the most favourable system for active ageing. [less ▲]

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See detailTrade Credit and firm Comovements
Pisa, Magdalena UL; Bos, Jaap; Bams, Dennis

E-print/Working paper (2015)

This paper provides evidence that production linkages, as well as credit chains (represented by trade credit), are important for the transmission of idiosyncratic (firm-level) shocks across firms in the ... [more ▼]

This paper provides evidence that production linkages, as well as credit chains (represented by trade credit), are important for the transmission of idiosyncratic (firm-level) shocks across firms in the economy. We build on the idea that trade credit develops along production linkages, and amplifies the idiosyncratic shock as firms may lack inputs and also liquidity. Using disaggregated firm-level data we show that the disturbance of customer's sales increases with greater trade credit linkage. We show that during a recession the existence of trade credit linkage propagates shocks upstream, from a supplier onto its upstream customer. In these periods, firms are short of liquidity and are unable to withstand a drop in trade credit provision. In good times, however, trade credit plays a stabilizing role, reducing the volatility of firms' sales. In these periods, firms with sufficient liquidity are able to transfer some of it to liquidity-starved production partners in order to guarantee their own stable production. [less ▲]

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See detailZur Bedeutung der Tiermetaphorik in der Verschränkung von Ökonomie & Gender bei Jelinek
Bloch, Natalie UL; Pelka, Artur

E-print/Working paper (2015)

Detailed reference viewed: 53 (6 UL)
See detailUrban social structure, social capital and spatial proximity
Patacchini, Eleonora; Picard, Pierre M UL; Zenou, Yves

E-print/Working paper (2015)

We develop a theoretical model where the existence and intensity of dyadic contacts depend on location. We show that agents tend to interact more with agents that are highly central in the network of ... [more ▼]

We develop a theoretical model where the existence and intensity of dyadic contacts depend on location. We show that agents tend to interact more with agents that are highly central in the network of social contacts and that are geographically closer. Using a unique geo-coded dataset of friendship networks in the United States, we find evidence consistent with this model. The main empirical challenge, which is the possible endogenous network formation, is tackled by employing a Bayesian methodology that allows to estimate simultaneously network formation and intensity of network contacts. [less ▲]

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See detailRegards sur les cambriolages et les tentatives de cambriolages
Heinz, Andreas UL; Steffgen, Georges UL; Frising, Armande et al

E-print/Working paper (2015)

Selon l’enquête sur la sécurité 2013, 10% des ménages ont été victimes d’un cambriolage et 9% ont subi une tentative de cambriolage au cours des 5 dernières années. Il s’agit d’introductions ou de ... [more ▼]

Selon l’enquête sur la sécurité 2013, 10% des ménages ont été victimes d’un cambriolage et 9% ont subi une tentative de cambriolage au cours des 5 dernières années. Il s’agit d’introductions ou de tentatives d’introduction dans leur bien immobilier au Luxembourg ou à l’étranger. La grande majorité des effractions (83%) a eu lieu au Grand-Duché et près d’un tiers (35%) se sont produites entre 22h et 6h. Dans 73% des cas, l’habitation était visée ; les installations extérieures, annexes et abris de jardin étant moins souvent concernés (26%). Si dans près de 8 cambriolages sur 10 un vol a effectivement été commis, la violence physique quant à elle reste plutôt rare (2%). 21.5% des incidents n’ont pas été déclarés à la police, en général parce que les victimes ont jugé que ça n’en vallait pas la peine. Lorsque le cambriolage a été déclaré, 47% des déclarants étaient « très satisfaits » et 23% « satisfaits » des services de la police. Les victimes de cambriolages ou tentatives de cambriolages sont davantage d’avis que le niveau de criminalité a globalement augmenté que les non-victimes. Ils apprécient moins le travail de la police et des tribunaux et se prononcent plutôt en faveur de peines de prison pour les cambrioleurs tandis que les non-victimes plaident plutôt pour des sanctions sous forme de travaux d’intérêt général. [less ▲]

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See detailHealing through Liquidity Injections ?
Rasmouki, Fanou UL

E-print/Working paper (2015)

The unprecedentedly high borrowing costs of banks along with the armada of interventions by the ECB and kin institutions to prevent a financial haemorrhage underpin the motivation of this paper to re ... [more ▼]

The unprecedentedly high borrowing costs of banks along with the armada of interventions by the ECB and kin institutions to prevent a financial haemorrhage underpin the motivation of this paper to re-visit the connection between default probabilities à la Merton and borrowing costs for a sample of large European banks. In doing so, the paper also investigates the ramifications of the ECB’s interventions on the health of the banking system. Furthermore, and building on Merton’s model, it proposes a simple measure of credit spreads that accounts for the nature of the credit risk profile of large financial institutions. The findings are unequivocal and suggest that higher default probabilities significantly explain the deteriorating ability of banks to borrow from the financial markets. More importantly, there is an increase in the degree to which default probabilities explain borrowing costs when policy measures undertaken by the ECB are incorporated. Conversely, the effect of the liquidity interventions is ambivalent: While liquidity measures directed towards the banking system have a curing effect on the borrowing costs of banks, those related to sovereigns seemingly have an impeding effect. [less ▲]

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See detailWohnmobilität in der Großregion - eine interurbane Diskursanalyse
Christmann, Nathalie UL

E-print/Working paper (2015)

“Je t’aime, moi non plus” : this is how the French newspaper L’Express (2011, p. II) summarises the transnational linkages of Luxembourg with its neighbouring countries. On the one hand, the ‘economic ... [more ▼]

“Je t’aime, moi non plus” : this is how the French newspaper L’Express (2011, p. II) summarises the transnational linkages of Luxembourg with its neighbouring countries. On the one hand, the ‘economic engine’ Luxembourg offers workplaces for many commuters, positively affecting the development of this European cross-border polycentric metropolitan region; on the other hand, negative consequences such as the overcrowded real estate mar-ket in Luxembourg continue beyond the national border and affect neighbouring housing markets. The ‘2020 Concept for the Region Trier’ shows that city councils perceive the prox-imity to Luxembourg as an opportunity for the development of the city. Simultaneously, lo-cals might feel displaced due to increasing rents and house prices, and develop resentment vis-à-vis their new neighbours, coming either from Luxembourg, or being Belgian, German or French nationals (labour migrants) that have moved to the border region to work in the Grand Duchy of Luxembourg, thus disposing of higher purchase power. Depending on the context, similar effects can thus be perceived very differently by city councils or planners and the local population. So far, studies dealing with the processes of transmigration have mostly focussed on indi-vidual motives of migrants, whereas impacts on the regions of destination have not been explored. The aim of this study is to explore ongoing discourses dealing with spatial impacts in relation to urban housing markets within the Greater Region. The focus will be on the cit-ies Arlon (BE), Metz and Thionville (FR), and Trier (DE). Therefore mixed methods will be de-ployed. Firstly, a quantitative analysis is planned to reveal the magnitude and the spatial distribution of the (cross-border) residential mobility. The evolution of housing prices and rents as well as population dynamics will be examined. Secondly, ongoing discourses and the changes of life-worlds will be studied using quantitative methods as well as qualitative methods, such as content analysis, to review the guiding principles of municipal policy and urban planning documents. A quantitative analysis of local newspapers will be conducted to analyse public opinion. A content analysis of this material will follow. The method mix allows us to better understand “material” evolutions and to trace the current discourses within this field. Discourse approaches have become common in interdis-ciplinary social science academic research. However, there are no established theoretical and methodological guidelines for applying these approaches. This project has to deal with this situation and to take into account different cultural backgrounds and discussion levels. This study will help to frame today’s situation and aims to develop sustainable solutions for future urban planning. [less ▲]

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See detailInternational vergleichende Analyse von Einrichtungen und Arbeitszusammenhängen der Interkulturalitätsforschung
Wille, Christian UL; von der Wense, Edwina; Heimböckel, Dieter UL

E-print/Working paper (2015)

Die vorliegende vergleichende Analyse von Einrichtungen und Arbeitszusammenhängen der Interkulturalitätsforschung wurde im Zuge der Einrichtungen des fakultären Schwerpunktbereichs MIS – Mehrsprachigkeit ... [more ▼]

Die vorliegende vergleichende Analyse von Einrichtungen und Arbeitszusammenhängen der Interkulturalitätsforschung wurde im Zuge der Einrichtungen des fakultären Schwerpunktbereichs MIS – Mehrsprachigkeit und Interkulturelle Studien durchgeführt. Ziel war es zentrale Orientierungspunkte für eine strategische Positionierung und für zukünftige Entwicklungslinien des Schwerpunktbereichs zu gewinnen. Dafür wurden die Internetseiten von 64 vergleichbaren Einrichtungen bzw. Arbeitszusammenhängen der Interkulturalitätsforschung inhaltsanalytisch untersucht. Zur Stichprobe zählen in erster Linie eigenständige Zentren und Institute/Abteilungen aus dem universitären Kontext mit international breit gestreuten Standorten; Arbeitszusammenhänge bzw. Einrichtungen aus dem deutschsprachigen Raum sind besonders gut vertreten. [less ▲]

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See detailFunction spaces and classifying spaces of algebras over a prop
Yalin, Sinan UL

E-print/Working paper (2015)

The goal of this paper is to prove that the classifying spaces of categories of algebras governed by a prop can be determined by using function spaces on the category of props. We first consider a ... [more ▼]

The goal of this paper is to prove that the classifying spaces of categories of algebras governed by a prop can be determined by using function spaces on the category of props. We first consider a function space of props to define the moduli space of algebra structures over this prop on an object of the base category. Then we mainly prove that this moduli space is the homotopy fiber of a forgetful map of classifying spaces, generalizing to the prop setting a theorem of Rezk. The crux of our proof lies in the construction of certain universal diagrams in categories of algebras over a prop. We introduce a general method to carry out such constructions in a functorial way. [less ▲]

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See detailEspaces de frontière. Penser et analyser la frontière en tant qu’espace
Wille, Christian UL

E-print/Working paper (2015)

Les frontières se différencient non seulement en fonction des domaines d'étude où elles sont opérantes ou dans lesquels elles se constituent, mais également en termes de modes de (re)production et de ... [more ▼]

Les frontières se différencient non seulement en fonction des domaines d'étude où elles sont opérantes ou dans lesquels elles se constituent, mais également en termes de modes de (re)production et de formes. Cette communication traitera en premier lieu de la forme de la frontière, sachant que ce n’est pas la frontière territoriale en tant que ligne qui importera, mais plutôt son caractère zonal et la question de savoir comment il est possible de l'aborder dans une perspective théorico-conceptuelle aux fins de l’étude empirique. Il est plus judicieux de considérer les frontières territoriales comme zones ou espaces, la métaphore de la ligne s'avérant une pure fiction. Jusqu’au XVIIIe siècle, les frontières étaient conçues comme des espaces de contact et des zones de transition (convoitées), ce n’est qu’avec l’avènement d’États nationaux modernes que s’établit le concept de frontière comme ligne – sans qu’elle n’ait perdu empiriquement son caractère zonal. C’est ce qu’on peut notamment constater dans les régions transfrontalières où les frontières territoriales ne peuvent se réduire à leur fonction de différenciation ou de passerelle, mais au contraire s’élargissent – comme le montre la mobilité transfrontalière des travailleurs, des consommateurs ainsi que la mobilité résidentielle – se transformant ainsi en zones de l'entre-deux. Ces zones ne peuvent pas être concédées aux espaces situés en deçà et au-delà d’une frontière territoriale, elles représentent en revanche des espaces autonomes, lesdits « espaces de frontière » qui revêtent une identité liminale. L'objet de cette communication est de savoir comment il est possible de décrire et d'étudier de tels espaces que l'on peut observer comme productions quotidiennes. Il s’agit (1) de percevoir de manière conceptuelle le caractère zonal de la frontière, donc la dimension spatiale, (2) le potentiel innovateur et imprévisible de la liminalité et ainsi la contingence sociale. La géographie sociale et la sociologie de la culture en livrent des points de départ pertinents. La mise en relation d’approches concernant l’espace et la pratique sociale issues de ces deux disciplines représente la base du modèle « espaces de frontière » qui permet de penser les frontières en tant qu’espaces et met en place une heuristique destinée à l’étude de constitutions spatiales centrées sur le sujet comme (re)productions des frontières. Les pratiques sociales, la connaissance pratique ainsi que les aspects physico-matériels et socio-structurels tels qu'ils sont appropriés et engendrés par les « frontaliers » dans des références transfrontalières, font partie des catégories d'analyse. [less ▲]

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See detailInequality of opportunity during the great recession in Uganda
Palmisano, Flaviana UL; Brunori, Paolo; Peragine, Vito

E-print/Working paper (2015)

Detailed reference viewed: 89 (3 UL)
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See detailCurrency Areas and Voluntary Transfers
Picard, Pierre M UL; Worrall, Tim

E-print/Working paper (2015)

This paper discusses the relationship between the formation of a currency area and the use of voluntary fiscal transfers between countries. We show that there is a trade off between the benefits of ... [more ▼]

This paper discusses the relationship between the formation of a currency area and the use of voluntary fiscal transfers between countries. We show that there is a trade off between the benefits of flexible exchange rates and the additional risk sharing benefits of voluntary transfers that can be sustained in a currency area. We show that whether a currency area is beneficial or not will depend on the magnitude of economic parameter values. In particular, we show that in a simple two country model and for a plausible set of economic parameter values, a currency area is optimal. [less ▲]

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See detailMultilingualism in advertising and a shifting balance of languages in Luxembourg
De Bres, Julia UL

E-print/Working paper (2015)

Much research on multilingualism in advertising has been undertaken in comparatively mono-lingual settings. Whereas such research may provide insights into the connotations of lan-guages used in ... [more ▼]

Much research on multilingualism in advertising has been undertaken in comparatively mono-lingual settings. Whereas such research may provide insights into the connotations of lan-guages used in advertising, research in more multilingual contexts can also provide different kinds of insights regarding the relative status of languages in a multilingual environment. This article focuses on multilingualism in written advertising in the highly multilingual setting of Luxembourg, where the language situation is currently undergoing significant change due to patterns of globalisation and migration. Analysis of a mixed corpus of advertisements, includ-ing 1,038 advertisements in the free daily newspaper l’Essentiel from 2009 to 2011, as well as selected further advertisements from elsewhere within Luxembourg’s linguistic landscape, reflects a move within Luxembourg in general from a longstanding trilingualism in French, German and Luxembourgish to different kinds of multilingualism, incorporating both the presence of new languages and changes in the relative roles of French, German and Luxem-bourgish. Particularly significant is the presence of Luxembourgish as a written language of advertising, whereas it traditionally functioned mainly as a spoken language in Luxembourg. The article presents the results of a quantitative and qualitative analysis of the advertisements and discusses how multilingualism in written advertising provides a pertinent window on changing forms of multilingualism in Luxembourg. [less ▲]

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See detailIntertemporal pro-poorness
Palmisano, Flaviana UL; Bresson, Florent; Duclos, Jean-Yves

E-print/Working paper (2015)

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See detailIncreases in well-being after transition to retirement for unemployed. Catching up with formerly employed persons.
Ponomarenko, Valentina UL; Leist, Anja UL; Chauvel, Louis UL

E-print/Working paper (2015)

This paper examines the extent to which well-being levels change in the transition to retirement depending on transitioning from being employed, unemployed, or economically inactive. Whereas transitioning ... [more ▼]

This paper examines the extent to which well-being levels change in the transition to retirement depending on transitioning from being employed, unemployed, or economically inactive. Whereas transitioning from employment to unemployment has been found to cause an increase in depressive symptoms or decline in life satisfaction with more time spent in unemployment, it is not clear to which extent transitioning from unemployment to retirement affects well-being levels compared to retiring after being employed or economically inactive. We use two waves of the Survey of Health, Ageing and Retirement in Europe monitoring respondents transitioning to retirement and use life satisfaction as well-being measure. The effect of the transition is captured with a difference-in-difference like approach to test if the change in well-being after retirement is different for persons who were formerly unemployed or inactive, respectively, compared to formerly employed retirees. Results indicate that retiring from unemployment is associated with an increase in life satisfaction, but presents mainly a catching-up effect compared to employed persons transitioning to retirement. Retirement from labour market inactivity, especially sick leave, does not lead to significant changes in well-being. Findings are robust to selection into unemployment and country differences. As well-being of unemployed persons recovers after transitioning to retirement, especially the currently unemployed population should be supported to prevent detrimental consequences of economically unfavourable conditions and lower well-being. [less ▲]

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See detailLanguage profiles and practices of cross-border workers in Luxembourg
Franziskus, Anne UL; De Bres, Julia UL

E-print/Working paper (2015)

This paper summarises the findings of a questionnaire study investigating the language pro-files and practices of cross-border workers in Luxembourg. The study was undertaken in 2009 and includes 128 ... [more ▼]

This paper summarises the findings of a questionnaire study investigating the language pro-files and practices of cross-border workers in Luxembourg. The study was undertaken in 2009 and includes 128 cross-border workers from 35 workplaces from different sectors, including the health sector, higher education and research, the manufacturing industry and the service sector. The study suggests that all the participants have a multilingual profile and have learnt at least one language in addition to their first one in the course of their life. A second result is that French is used in all the workplaces under investigation. But, at the same time, the major-ity of the cross-border worker participants have a multilingual professional life, most of them using more than one language at work on an everyday basis. This multilingualism comes in the form of a wide range of multilingual practices, including language accommodation, use of a lingua franca, code-switching and receptive multilingualism. Furthermore, two thirds of the participants report having learnt Luxembourgish either formally or informally, and half of those who have not learnt it, would like to do so in the future. [less ▲]

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See detailMonetary Policy with 100% Reserve Banking: An Exploration
Mehra, Rajnish UL; Wessel, Ryan; Prescott, Edward C.

E-print/Working paper (2015)

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See detailHedonic adaptation to a treatment. Evidence from a medical intervention
Barazzetta, Marta UL; Appleton, Simon; Owens, Trudy

E-print/Working paper (2015)

We investigate adaptation of subjective well-being using a randomized controlled trial. We find that providing medical equipment to a random sample of Ugandan adults with lower limb disabilities has a ... [more ▼]

We investigate adaptation of subjective well-being using a randomized controlled trial. We find that providing medical equipment to a random sample of Ugandan adults with lower limb disabilities has a positive effect on their physical health, using both objective and self-reported measures. Treated patients experience a significant improvement in life satisfaction initially, but the effect is not prolonged. After one year, life satisfaction returns to the pre-treatment level, supporting the hypothesis of adaptation. This evidence of adaptation is supported by observations of changes in aspirations and expectations and is robust to alternative estimation methods including instrumental variable estimation and ITT analysis. [less ▲]

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See detailRadical Innovation – A domain of SMEs? A novel test of the Schumpeterian Hypothesis
Abou Lebdi, Nabil UL

E-print/Working paper (2015)

The Schumpeterian Hypothesis has been subject to a plethora of research aiming at the provision of new insights to the relationship of innovation on firm size. Utilizing a panel of German companies in ... [more ▼]

The Schumpeterian Hypothesis has been subject to a plethora of research aiming at the provision of new insights to the relationship of innovation on firm size. Utilizing a panel of German companies in manufacturing industries from 1993-2011, this analysis explicitly distinguishes between radical and incremental innovation output. It reveals that firm size and radical innovation share an overall negative relationship, while the relationship between firm size and incremental innovation is positive. These results provide a novel explanation for the often-reported non-linear relationship between firm size and innovation. [less ▲]

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See detailOn the Impact of Exclusion Filters Rules in Option Pricing
Lehnert, Thorsten UL; Dennis, Brams; Gildas, Blanchard

E-print/Working paper (2015)

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