We analyze the effects of money injections on interest rates and exchange rates when agents must pay a Baumol-Tobin-style fixed cost to exchange bonds and money. Asset markets are endogenously segmented because this fixed cost leads agents to trade bonds and money infrequently. When the...

We present a general equilibrium model of the response of firms' decisions to operate, innovate, and engage in international trade to a change in the marginal cost of international trade. We find that, although a change in trade costs can have a substantial impact on heterogeneous firms' exit,...

Recent empirical work on financial crises documents that crises tend to occur when macroeconomic fundamentals are weak; but even after conditioning on an exhaustive list of fundamentals, a sizable random component to crises and associated capital flows remains. We develop a model of herd...