Poncet, S.

trade market market access china province access effect chinese border chinese provinces industry country level equation result fi rms economy border effects impact worker table model column sector economic price integration trade fl ows enterprise product policy labor paper production region review inter-provincial number barrier development protection study signi import border effect estimate market integration mayer distance measure authority coef ficient wage disparities location section difference consumption trade policy world variable state reform government trade barriers journal capacity inter-provincial trade geography increase ficient intra-provincial industry-level income statistic migration value demand ϫ0.001 disparity skill