This paper contributes to the literature by comparing the productivity distribution for firms with various numbers of goods traded and various numbers of countries traded with from Germany, one of the leading actors on the world market for goods. It applies a non-parametric test for first-order...

Feenstra and Ma (2008) develop a monopolistic competition model where firms choose their optimal product scope by balancing the profits from a new variety against the costs of cannibalizing sales of existing varieties. While more productive firms always have a higher market share, there is no...

Feenstra and Ma (2008) develop a monopolistic competition model where firms choose their optimal product scope by balancing the profits from a new variety against the costs of 'cannibalizing' sales of existing varieties. While more productive firms always have a higher market share, there is no...