on gravity modeling and estimation for international trade and migration and on domestic firm-level labor market effects … migration frictions. Chapter 3 asks how the welfare quantification of trade liberalization changes if one allows workers to be … trade with endogenous international migration choices of workers. We use the model for an ex ante comparative static welfare …

suggests that eliminating these subsidies would result in a welfare gain for China comparable to that of halving its trade …

the data. We derive the sectoral EPP in a standard heterogeneous firms trade model and apply the insights from the model … EPPs across sectors, and hence across countries, can be explained by the variation in productivity dispersion, trade costs …