[en] The prior distribution is a crucial building block in Bayesian analysis, and its choice will impact the subsequent inference. It is therefore important to have a convenient way to quantify this impact, as such a measure of prior impact will help to choose between two or more priors in a given situation. To this end a new approach, the Wasserstein Impact Measure (WIM), is introduced. In three simulated scenarios, the WIM is compared to two competitor prior impact measures from the literature, and its versatility is illustrated via two real datasets.
Disciplines :
Engineering, computing & technology: Multidisciplinary, general & others Mathematics
Author, co-author :
LEY, Christophe ; University of Luxembourg > Faculty of Science, Technology and Medicine (FSTM) > Department of Mathematics (DMATH)
Ghaderinezhad, Fatemeh; Ghent University > Department of Applied Mathematics, Computer Science and Statistics
Serrien, Ben; Vrije Universiteit Brussel - VUB > Experimental Anatomy Research Group
External co-authors :
no
Language :
English
Title :
The Wasserstein Impact Measure (WIM): A practical tool for quantifying prior impact in Bayesian statistics
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