: If your variables are correlated with the error term, use Instrumental Variables ( xtivreg ).
Mastering requires practice and reference. stata panel data
: [Your Name] is an applied econometrician specializing in longitudinal data analysis using Stata. This article is part of the Stata Mastery Series . : If your variables are correlated with the
xtdpdgmm wage L.wage experience union, gmm(L.wage, lag(2 4)) iv(experience union) lag(2 4)) iv(experience union)