Basel III features requirements on bank capital and liquidity along with disclosure requirements. I study these prudential tools by developing a general equilibrium model with bank runs in a global game framework, where leverage, liquidity, interest rates, and the probability of a banking crisis are all determined endogenously. With timely disclosure about bank assets, the unregulated economy has efficient liquidity but excessive leverage due to a pecuniary externality, warranting a leverage restriction. Delayed disclosure gives rise to bank risk shifting, making leverage even more excessive and liquidity insufficient, which warrants joint requirements on leverage and liquidity. Empirical predictions and policy implications are derived and discussed.

We describe a general equilibrium model in which an agency problem arises because bankers must exert an unobserved and costly effort to perform their task. Suppose aggregate banker net worth is too low to insulate creditors from bad outcomes on their balance sheet. Then, banks borrow too much in equilibrium because there is a pecuniary externality associated with bank borrowing. Social welfare is increased by imposing a binding leverage restriction on banks. We formalize this argument and provide a numerical example.