International differences in the cost of production of a key intermediate product can mean that a domestic firm is dependent on supplies from a foreign vertically integrated firm. This paper considers the incentives for the foreign firm and foreign country to supply the domestic firm when the firms compete in a Cournot or Bertrand market for the final product. The vertical supply decision is significantly affected by domestic supply conditions for the input and a domestic tariff on final product imports. Optimal policy by the exporting country may require a tax on both exports, or a subsidy on both exports.

Friedman's (1960) proposal to pay interest on (required) reserves is considered in a setting that eliminates the indeterminacy of steady-state equilibrium discussed by Sargent and Wallace (1985). In an overlapping-generations model where the real rate of interest is technologically determined, the payment of interest on reserves results in a determinate, Pareto optimal steady-state equilibrium. However, interest payments on reserves reduce the steady-state welfare of all young agents and, for many economies, result in the existence of stationary sunspot equilibria. This is the case even if such equilibria cannot exist when reserves do not earn interest.

An endogenous growth model with multiple assets is developed. Agents who face random future liquidity needs accumulate capital and a liquid, but unproductive asset. The effects of introducing financial intermediation into this environment are considered. Conditions are provided under which the introduction of intermediaries shifts the composition of savings toward capital, causing intermediation to be growth promoting. In addition, intermediaries generally reduce socially unnecessary capital liquidation, again tending to promote growth.