We present a new model of multi-product firms (MPFs) and flexible manufacturing and explore its implications in partial and general equilibrium. International trade integration affects the scale and scope of MPFs through a competition effect and a demand effect. We demonstrate how MPFs adjust in...

We present a new model of multi-product firms (MPFs) and flexible manufacturing, and explore its implications in partial and general oligopolistic equilibrium. Globalization affects the scale and scope (or intensive margin and intra-firm extensive margin) of MPFs through a competition effect and...

Ex-post firm heterogeneity can result from different strategies to overcome labor market imperfections by ex-ante identical firms—with far-reaching consequences for the welfare effects of trade. With asymmetric information about workers' abilities and costly screening, in equilibrium some...