We develop a monopolistically competitive model of trade with firm heterogeneity - in terms of productivity differences … productivity of competing firms. We analyze how these features vary across markets of different size that are not perfectly … in that market. Aggregate productivity and average markups thus respond to both the size of a market and the extent of …

increased competition from demand shocks in export markets - and the induced product mix reallocations - induce productivity … changes within the firm. We then empirically test for this connection between the demand shocks and the productivity of multi …-product firms exporting to those destinations. We find that the effect of those demand shocks on productivity are substantial - and …

This paper explores the impact of immigrants on the imports, exports and productivity of service-producing firms in the … productivity of the firm as well as its export behavior. The first effect can be understood as the re-assignment of offshore … productive tasks to immigrant workers. The second can be seen as a productivity or cost cutting effect due to immigration, and …

and countercyclical exit along a real business cycle lead to endogenous cyclical movements in average firm productivity …