Dear Statalist,

I am trying to estimate a SFM that can address selection bias. Theoretically, I am aware that Greene (2010) developed an approach that can address selection bias in SFA.

But, I couldn't find any way to conduct that analysis in STATA.

Thus, I kindly ask your help in the following two questions.

1. Could anyone provide me a stata command to estimate the Greene's 2010 model?

2. Though Greene's approach can be used for two choices, it couldn't work if you have more than two choice sets. Hence, I want to know if someone has extended this approach?


Thank you!