This paper provides a minimalist derivation of the gravity equation and uses it to identify three common errors in the literature, what we call the gold, silver and bronze medal errors. The paper provides estimates of the size of the biases taking the currency union trade effect as an example....

This paper addresses the final steps to global free trade – what they might look like, what sort of political economy forces might drive them, and what the WTO might do to guide them. Two facts form the point of departure: 1) Regionalism is here to stay; world trade is regulated by a motley...