Value at Risk has become the standard measure of market risk employed by financial institutions for both internal and regulatory purposes. Despite its conceptual simplicity, its measurement is a very challenging statistical problem and none of the methodologies developed so far give satisfactory...

We propose a semi-parametric approach to investigate whether co-dependence across markets increase in periods of extreme returns. Given that returns on one market fall in the extreme tail of their own distribution, we compute the conditional probability that returns on another market will also...

We examine the role of different explanations for the lack of flows of capital from rich to poor countries---the Lucas paradox---in an empirical framework. Broadly speaking, the theoretical explanations for this paradox include differences in fundamentals affecting the production structure...