Faced with the problem of pricing complex contingent claims, an investor seeks to make his valuations robust to model uncertainty. We construct a notion of a model- uncertainty-induced utility function and show that model uncertainty increases the investor's effective risk aversion. Using the...

Faced with the problem of pricing complex contingent claims, investors seek to make their valuations robust to model uncertainty. We construct a notion of a model-uncertainty-induced utility function and show that model uncertainty increases investors’ effective risk aversion. Using this...

This paper is concerned with the behavior of the risk premium on the market portfolio of risky assets. The paper provides a characterization of the evolution of the market risk prem ium in economies where the variance of the return on the market has constant variance and market index options can...