The authors study a simple model of tariff wars and trade deals in which government revenue collection and disbursement uses resources. The introduction of costly governments leads to lower non-cooperative tariffs, the possibility that a less costly government may win a tariff war, and fully...

The authors develop a model in which states may choose to form coalitions to capture efficiency gains from policy coordination. Joining a coalition entails setting the policy variable to maximize the coalition's aggregate payoff at a Nash equilibrium against nonmembers and to commit to a...