On Friday, June 29, 2012 at 1:39 PM, Katelyn Sack wrote:
Dear list,When I try using cem in Stata 10, I get the error "no variables defined in option treatment(), r(111);" even though my syntax looks fine. (My command was "cem AGCYTYPE POPULATION region lblackproportion, tr (POLYEXAM).") The website indicates it works in version 10.When I try using it in Stata 12, I think the program gets a little farther. But I still get the error "cem_weights not found" after the commands:cem AGCYTYPE POPULATION region lblackproportion, tr (POLYEXAM)reg lblackproportion POLYEXAM YP YEAR [iweight=cem_weights]Any ideas how to troubleshoot? My best guess is that I skipped important pre-cem steps and the program is protesting that sort of human error. Perhaps the matched N (672) is too small and so I should simulate more data to produce more matches?Many thanks,Katelyn--Katelyn Sack, Ph.D. candidateUniversity of Virginia
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