Recent models of the evolution of preferences have provided profound new insights into the origins of risk attitudes. In most of these models the evolutionary "objective function" is the maximization of the expected number of offspring, or alternatively, the maximization of the geometric-mean...

Prospect Theory (PT) and Constant Relative Risk Aversion (CRRA) have clear-cut implications for the optimal asset allocation between stocks and the risk-free asset as a function of the investment horizon. While CRRA preferences imply that the allocation should be independent of the horizon, we...