This paper presents a positive theory of centralization of political decisions in an international union. My central claim is that lobbies play a role in determining the assignment of competencies to the union because their power of influence can increase or decrease under centralization. I show...

This paper discusses the channels between openness and productivity and trade hampering factors. The stylized facts from the heterogeneous firms literature suggests that firms face market entry costs for each new product they export and to each new export market. Transport costs, border costs...