This paper studies the under-explored yet critical role of WTO's regular bodies, particularly focusing on the discussions of "trade concerns" within the Goods Council, its subsidiary bodies, as well as the General Council. These discussions are pivotal for the governance of international trade...

Due to markup distortions, in international trade models with monopolistic competition and heterogeneous firms the market equilibrium is inefficient unless demand exhibits constant elasticity of substitution. When it does not, global welfare maximization generally requires policy intervention...