use https://www3.nd.edu/~rwilliam/statafiles/wages, clear
xtset id t
* This will produce better R code than was in the Socius 2017 paper
* If desired, first switch to the directory where you want the R file stored
xtdpdml wks L.lwage, pre(L.union) inv(ed) errorinv lavaan(Socius, r)