Worldwide trade flows are dominated by high-productivity firms, that have a large range of products. Since the product …

markets but rather they adapt their choices to better match with country characteristics. By using metrics based on export …-country variability observed in firms' export patterns. Our results resist when we control for a firm's choice of not exporting an …

firms always have a higher market share, there is no monotonic relationship between firms' productivity level and their … effect". Therefore, the incentive to add more products weakens as productivity rises. This leads to Lemma 3 in Feenstra and … evidence is in line with the results from the theoretical model. -- multi-product firms ; productivity ; optimal product scope …