st: "covariates in dataset 2 do not match covariates in dataset1"
Mon, 15 Mar 2010 18:46:22 -0400
I'm working with a multiply imputed dataset (so I have 5 poverty
variables to account for missing values). I used the -reshape long-
command to make each imputed variable it's own case (so now, for each
case, I have it listed 5 times each with 1 imputation of income).
I'm running a series of regressions, trying to fine tune the predictor
variables. The first regression runs fine but subsequent regressions
(whether I use my .do file or copy & paste them into the command
window) will not calculate. I receive an error message stating that
"covariates in dataset 2 do not match covariates in dataset1".
I checked the file and everything seemed fine; the only things that
don't exactly match across imputations of the dataset are the poverty
values. In fact, I've used this exact procedure on 2 other (very
similar) datasets with no problems. It's only been in the last month
that I receive this message.
What doesn't make sense to me is that the first regression command
runs perfectly fine but subsequent commands do not (they're all in
exactly the same form-- mim: svy: logistic dv iv1 iv2 iv3). And if I
close Stata and then open it and run the second regression it works.
I've attempted to run this analysis on Stata9 Intercooled and Stata11
SE. It doesn't seem to matter; I receive the same error.
Do you have any recommendations or suggestions for me as to why this
happens and/or how to fix it?