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st: ivprob and collinearity
I have a query on the ivprob command.
After having set trace on I discovered where I got the conformability error
message - it is after the last line of this bit of program
/* get lee model estimates */
cap estimates drop lastpbt
probit `depvar' `fitted' `exog' if `touse'
matrix tmp = get(_b)
matrix colnames means = `endog' `exog' _cons
The probit part of the command automatically excludes collinear variables and
therefore the 'exog' list and the list of regressors are different so that
when stata tries to assign column names - there are less columns than names in
Presumably this problem will reoccur at later stages of the program.
Can anyone suggest a simple way of amending this program to deal with this
problem? My programming skills are not so great.
Hope someone can help.
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