Empirical evidence shows that observed macroeconomic fundamentals have little explanatory power for nominal exchange rates (the exchange rate determination puzzle). On the other hand, the recent \microstructure approach to exchange rates" has shown that most exchange rate volatility at short to...

The informational content of changing risk for dynmaic asset allocation is analyzed in order to investigate its importance in determining expected index returns. We consider a class of optimal dynamic strategies taking into account both changing risk and expected returns that vary accordingly to...

Individual and collective security are among the gauges of civilization, and at the same time they constitute necessary conditions for its progress. Their systematic pursuit is relatively recent among nations: prompted by the dreadful lessons of the 20th century, they took their present shape...