This study develops and implements a theory and method for analyzing whether introducing new securities or relaxing investment constraints improves the investment opportunity set for risk averse investors. We develop a test procedure for ‘stochastic spanning’ for two nested polyhedral...

This study develops and implements methods for analyzing whether introducing new securities or relaxing investment constraints improves the investment opportunity set for risk averse investors. We develop a statistical test procedure for ‘stochastic spanning' for two nested polyhedral...

This paper extends the partial (PE) and general equilibrium (GE) analyses of Nash and Stackelberg optimum export taxes to a multicountry framework, using a computable general equilibrium (CGE) model of the global cocoa market. There are several important results to report. First, depending on...

This paper uses the variance-ratio-based multiple comparison test and Richardson-Smith's Wald test procedures to test for martingale property of daily exchange rates of seven major currencies vis-a-vis US dollar. To allow for the possibility that exchange rates are not governed by a single...