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2009 Jul 08
1
clogit comparison between Stata and R
...since.dem^2) + timesince.dict + I(timesince.dict^2) + p_polity2 + I(p_polity2^2) + strata(ccodecow) + cluster(ccodecow), method="approximate", data=univ) and I get an n of 3747. In Stata, I run clogit trans_dem avg_gle_rgdp_ratio loggle_rgdp timesince_dem timesince_demsq timesince_dict timesince_dictsq p_polity2 pol2sq, group(ccodecow) vce(cluster ccodecow) which I hope is the same model. I get a message "29 groups (935 obs) dropped because of all positive or all negative outcomes", and an n of 2812. Also, the coefficients are slightly different. I understand why Stata is dropping the...