The hypothesis being tested in this article is that participants in the foreign exchange market are improperly diversified across currencies. If this type of inefficiency were to be verified, it could constitute an explanation of the large volatility of exchange rates: traders who do not fully...

Transferring physical capital and transferring production and sales activities from one country to the other, typically entails large adjustment costs. The model of this paper features two homogeneous stocks of physical capital located in two different countries, separated by an "ocean." The two...

In the presence of transactions costs, no matter how small, arbitrage activity does not necessarily render equal all riskless rates of return. When two such rates follow stochastic processes, it is not optimal immediately to arbitrage out any discrepancy that arises between them. The reason is...

When several investors with different risk aversions trade competitively in a capital market, the allocation of wealth fluctuates randomly between them and acts as a state variable against which each market participant will want to hedge. This hedging motive complicates the investors’...

Much of financial theory neglects transactions costs. Perhaps the most successful implementation of it -- i.e. continuous-time portfolio choice and option pricing -- is downright inconsistent with the existence of any transactions cost at all. Nonetheless prima facie evidence from the trade is...