Dear Amelia-users, A newbie question: Does Amelia automatically detect and ignore identical variables with different names (i.e. perfectly collinear variables) or will this cause singularity/collinearity problems ending with an error message? E.g. if one has a variable 'ethnicity' where 1==Non-white and 0=White and another variable 'White' where 1==White 0==Non-White, would one be ignored or would the imputation always fall over? From reading other messages (e.g. https://lists.gking.harvard.edu/pipermail/amelia/2012-May/000869.html) the suggestion is that one of these would need to be dropped manually or an error message would appear (as long as the variables mapped onto one another perfectly as per Matt Blackwell's response). Thanks for any assistance, and apologies if this seems ridiculously straightforward/obvious! Dr. Alex Sutherland Research Methods Associate, Social Sciences' Research Methods Centre (SSRMC) http://www.ssrmc.group.cam.ac.uk/ Office 3.12 Institute of Criminology, University of Cambridge, Sidgwick Site CB3 9DA Tel: +44 (0)1223 746519 as2140(a)cam.ac.uk http://www.crim.cam.ac.uk/people/academic_research/alex_sutherland/

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