The Black-Scholesmodelis basedona one-parameter pricingkernel with constantelasticity. Theoretical and empirical results suggest declining elasticity and, hence, a pricing kernel withat leasttwo parameters.We price European-style optionson assets whose probability distributions have two unknown...

Should you buy a stock or a corporate bond? A common belief is that the Pratt-Arrow risk aversion measure gives the answer: a more risk averse investor will prefer more a corporate bond to a stock. However, this is not always true. In a simple portfolio problem with a riskless bond, a stock and...