I am looking to predict the probability of recession (US) using various indicators from FRED. My dependent variable is USREC (a binary variable for whether the US was in a recession that month) and I'm using three other indicators as independent variables. I have since coded the following:



Currently I'm just looking at lags of INDPRO alone, and for some reason, only the logit command works, not the probit. Specifically, when I run the following:

Code:
logit USREC L1.INDPRO L2.INDPRO L3.INDPRO, r
I get results. But if I run the following:

Code:
probit USREC L1.INDPRO L2.INDPRO L3.INDPRO, r
stata just keeps 'iterating' non-stop and I never get any results. Any idea what the problem is?