Heterogeneous trade agreements, WTO membership and international trade: an analysis using matching econometrics

This article explores the heterogeneous effects of trade agreements (TAs) and World Trade Organization (WTO) membership on the volume of international trade. We extend Baier and Bergstrand’s (2009a) application of matching econometrics by distinguishing between different types of TAs and WTO participation and account for the endogenous nature of trade policy. For a panel data set covering 1960–2005 and 187 countries, we find that the treatment effect on international trade systematically varies with the type of TA and WTO membership.