Dear all,I am rerunning an imputation from a while ago (Amelia version 1.6.3.), and the only change is that I'm using a one year lag on all independent variables instead of the 'original' variables. Otherwise the code + data is pretty much the same, and it ran fine then. I now use Amelia_1.7.2.After a chain length of 21, I get several lines saying error: inv(): matrix appears to be singular.I have now already kicked out a variable that was .98 correlated with another one - that did not solve the problem.The link to my data set: https://www.dropbox.com/s/uc2jst4asiwae4h/t1.RdataThe session info is copied below.I would be very grateful for any hints on what I can improve.Thank you!Nicole--> sessionInfo()R version 3.0.1 (2013-05-16)Platform: x86_64-apple-darwin10.8.0 (64-bit)locale:[1] en_US.UTF-8/en_US.UTF-8/en_US.UTF-8/C/en_US.UTF-8/en_US.UTF-8attached base packages:[1] stats graphics grDevices utils datasets methods baseother attached packages:[1] Amelia_1.7.2 RcppArmadillo_0.3.900.0 Rcpp_0.10.3 foreign_0.8-54loaded via a namespace (and not attached):[1] tools_3.0.1--University of CambridgeNicole Janz, PhD Cand.Lecturer at Social Sciences Research Methods CentreDepartment of Politics and International StudiesSkype: nicole.janz
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