Dear STATALIST,

I am using an endogenous switching regression model to understand how selection affects a program's outcome. I use the movestay command by Lokshin and Sajaia (2004). It works fine though I get convergence issue with very large regression coefficients.

I now want to do some post estimation calculations in order to compute ATT and ATU. I use their exact code in the STATA journal which is "predicted fam, yc1 _1". However, STATA tells me the option
yc1 _1 not allowed.

What could be the issue?