I'm having problems with a simple probit not converging---the output
says "backed up" after 4-5 iterations. Im using Medical Expenditure
Panel Survey from 1996-2010 (about 217,000 observations) and running
a probit on the probability of being privately insured (private
(0,1) as the dependent variable). The explanatory variables include
a number of dummy variables, but even if I limit the list to only a
few dummy and continuous variables (family size, age, male, black,
employed), it still won't converge. Any suggestions on what else to
try? Im using Stata 12.
Thank you,
Helen
Sometimes adding the -difficult- option will work wonders. I would
consider going even simpler, adding just one or two variables at a
time. I would also consider running some descriptive statistics and
crosstabs. Make sure you don't have coding errors. If you want a 2nd
opinion, glm, oprobit and the user-written oglm (available from SSC)
can also estimate probit models.
