#delimit ; xtset conum year; *Model I, fixed effects included explicitly, dropped cases due to missing data, communist countries pre-1991 excluded per description; xi: xtgls total_oil_income_pc l1. total_oil_income_pc ivagdp barro_lee_education15plus loggdpcapconst year i.conum if pop>1000000 & (postcommunist==0 | (postcommunist==1 & year>1990)), p(h); estimates table, b se; *Model II; xtabond total_oil_income_pc ivagdp barro_lee_education15plus loggdpcapconst year if pop>1000000 & (postcommunist==0 | (postcommunist==1 & year>1990)), robust; estimates table, b se; *Model III; xtabond total_oil_income_pc loggdpcapconst year if pop>1000000 & (postcommunist==0 | (postcommunist==1 & year>1990)), robust endogenous (ivagdp barro_lee_education15plus); estimates table, b se;