00418pab a2200157 454500008004000000100001900040245009000059260000900149300001500158362000800173650001900181650001000200650002000210700001900230773001100249180718b2012   xxu||||| |||| 00| 0 eng d  aFiess, Norbert  aInformality and openness to trade: Insights from cross - sectional and panel analyses  c2012  ap.235-275.  aMay  aLiberalization  aTrade  aInformal sector  aFugazza, Marco  aMargin