00338nam a2200133Ia 4500020001500000082002300015100002200038245005300060260002900113300002700142500002500169500000500194700000500199  a1597180319  a518.5425bSt797.SL  aStata Corporation  aStata longitudinal/panel-data reference manualb  aTexasbStata Pressc2007  aiv, 474p. Bibl, Index.  a"Stata - Release 10"  a  a