What tariffs would countries impose if they did not have to fear any retaliation? What would occur if there was a complete breakdown of trade policy cooperation? What would be the outcome if countries engaged in fully efficient trade negotiations? And what would happen to trade policy...

This paper identifies the effect of trade policy on market power through new data and a new identification strategy. It uses a large data set containing export values and quantities by product and destination for all exporting firms in 12 developing and emerging countries over several years,...