We review a recent body of theoretical work that aims to put numbers on the consequences of globalization. A unifying theme of our survey is methodological. We rely on gravity models and demonstrate how they can be used for counterfactual analysis. We highlight how various economic...

We derive a simple equation for the welfare gains from trade when tariffs are liberalized or iceberg trade costs fall. Covering various one-sector trade models that may or may not feature extensive margins and imperfect competition, we generalize the analysis of Arkolakis, Costinot and...

We propose a multi-country general equilibrium model with three sectors and heterogeneous firms to analyze the linkages between offshoring and exports. We model a world consisting of many advanced countries that trade differentiated goods among each other and one "workbench country" that...