Hello, everyone.

I have a panel dataset consisting of two survey waves, and I am running fixed effects regression model. However, in addition to panel estimation, I would like to conduct a cross-sectional analysis for each of these waves separately. I get a different number of observations for each of the cross-sectional regressions. How can I make sure that I use the same individuals that were used by STATA in wave1 in a subsequent regression for wave2? I presume the problem arises due to missing values for certain variables.


Thank you very much in advance!