Sven Schreiber a écrit : > artur.bala schrieb: > >> Hello, >> >> I'm working with an unbalanced panel data and want to sub-sample on a >> dummy variable which has no mising values throughout the full sample. Is >> it normal that the outcome contain many empty observations? >> >>
> Or do you mean the > missings suddenly appear after the subsampling and weren't there before? > That's it. What surprised me is that I've got missing values (empty observations) even for the dummy variable instead of having 0 or 1. In addition, once I set the sample on dummy=0 and want to reset it on dummy=1 (using the --replace and --restrict flags) that's the full sample coming out. thanx, artur
