This article applies a conditionally heteroskedastic asset pricing model to describe the time variation in the first and second moments of asset returns in an interdependent way in the emerging capital market of Greece. Depending on the observability of the factors and under the chosen...

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...

We develop and implement methods for determining whether introducing new securities or relaxing investment constraints improves the investment opportunity set for prospect investors. We formulate a new testing procedure for prospect spanning for two nested portfolio sets based on subsampling and...