Inside Money , Business Cycle , and Bank Capital Requirements
A search theoretical model is constructed to study bank capital requirements in a respect of inside money. In the model bank liabilities, backed by bank assets, are useful for exchange, while bank capital is not. When the supply of bank liabilities is not sufficiently large for the trading demand, banks do not issue bank capital in competitive equilibrium. This equilibrium allocation can be suboptimal when the bank assets are exposed to the aggregate risk. Specifically, a pecuniary externality is generated because banks do not internalize the impact of issuing inside money on the asset prices in general equilibrium. Imposing a pro-cyclical capital requirement can improve the welfare by raising the price of bank assets in both states.