I'm using Amelia for multiple imputation, and after the creation of the Amelia object and m data sets, I want to use Zelig to automatically combine the results of my AR models. I have no problem getting it to work for LS models, when using summary and subset I can get either the combined model outputs or the output from individual imputed data sets. Using model="arima", however, this is not working. Instead, I always get m identical summaries, and this error: Error in tmp[, 1] : incorrect number of dimensions This occurs on different imputed data sets, so I'm not quite sure what I'm doing wrong. I can write (inelegant) code to do the averaging myself, but it's not easily portable. Any help would be much appreciated. Brad Epperly PhD Candidate Department of Political Science University of Washington Box 353530 Seattle, WA 98195 epperly(a)u.washington.edu