Foreign trade has significantly contributed to global improvements in living standards, a reduction in global inequality since the mid-1990s, and the lifting of millions out of extreme poverty. These gains were supported by the rules-based international order established after World War II....

As geopolitical tensions intensify, great powers often turn to trade policy to influence international alignment. We examine the optimal design of tariffs in a world where large countries care not only about economic welfare but also about the political allegiance of smaller states. We consider...