Why are trade agreements regional? I address this question in a model of oligopoly featuring product variety. Tariffs have the effect of manipulating a country's terms of trade and shifting profits towards the domestic market at the expense of foreign trade partners. Countries endogenously form...

The distance puzzle has been wildly discussed in the literature since Leamer and Levinsohn (1995) shed the light on it. This puzzle simply says that "the world is not getting smaller": distance still matters to account for trade. This is reflected in a decreasing distance of trade (DOT), or in a...