d STB-61 sg164. Specification tests for linear panel data models d STB insert by Walter Sosa-Escudero, National University of La Plata, d Argentina d Anil K. Bera, Department of Economics, University of Illinois d Support: wsosa@@feedback.net.ar d After installation, see help ^xttest1^ f sg164/example.do f sg164/grunfeld.dta f sg164/xttest1.ado f sg164/xttest1.hlp