In my thesis, I´m estiming a stochastic frontier model (SFM). The first equation estimates the production frontier model and the second equation estimates the inefficiency distribution, which is used in the production frontier function. For that purpose I used the sfpanel command in STATA.

However, the coefficients of the inefficiency distribution cannot really be interpreted in a easy way. Now, I'm trying to estimate the marginal effects of my model after running a two-equation regression.

However, I still cannot find the way to calculate these marginal effects for the variables that explain the term inefficiency.

Someone will have a suggestion