How should countries cooperate in setting fiscal and trade policies when government expenditures must be financed with distorting taxes? We show that even if countries cannot make explicit transfers to each other, every point on the Pareto frontier is production efficient, so that international trade and capital flows should be effectively free. Trade agreements must be supplemented with fiscal policy agreements. Residence-based income tax systems have advantages over source-based systems. Taxing all household asset income at a country-specific uniform rate and setting the corporate income tax to zero yield efficient outcomes. Value-added taxes should be adjusted at the border.

We analyze premarital investments in human capital and housing when individuals are unable to make binding commitments to share their labor income with a prospective spouse. Investments are distorted if there are gender differences in bargaining power over own labor income or marriage market imbalances. Distortions are magnified when ex ante bargaining power favors one sex (e.g., women in China) and ex post bargaining power favors the other (e.g., men in China), since parents of boys will increase housing investments in order to credibly commit to share more resources with the boy’s potential wife, possibly crowding out human capital investments.