averse to risk and ambiguity. The evidence is largely correlational, however, leaving open the question of the direction of … causality. In this paper, we present experimental evidence of causation running from reliance on intuition to risk and ambiguity … lowers the probability of being ambiguity averse by 30 percentage points and increases risk tolerance by about 30 percent in …

asset returns. Our contribution is to develop a framework that allows for ambiguity about the joint distribution of returns … for all stocks being considered for the portfolio, and also for different levels of ambiguity for the marginal … international equity returns. The calibration shows that when the overall ambiguity about the joint distribution of returns is high …

assets - and Markowitz - who advocates diversification across assets. We rely on the concepts of ambiguity and ambiguity … degree of ambiguity across assets, and (ii) the standard deviation of the estimate of expected return on each asset. If the … standard deviation of the expected return estimate and the difference between the ambiguity about familiar and unfamiliar …