equilibrium model with a fund offering the risk-adjusted market portfolio (RAMP), ambiguity averse investors hold the fund and an … optimal portfolio based on only one information source (price versus private signal). Asset risk premia satisfy the CAPM with …

.S. household survey, we measure ambiguity aversion using custom- designed questions based on Ellsberg urns. As theory predicts …

that theory has to offer and then runs a series of simple tests aimed at evaluating the empirical significance of various … of the marginal product of capital, and we find no evidence for the presence of a CAPM-based effect of risk …

role of secondary markets in providing opportunities for redistributing risk is made transparent and the modifications …

I characterize a dynamic economy under general distributions of households' risk tolerance, endowments, and beliefs … consumption-share increases; (b) the wealth-share of high risk-tolerant households increases; (c) richer households' wealth … risk sharing. Higher uncertainty increases stock prices, risk premiums, volatility, wealth inequality and the dispersion of …

explain a set of behavioral anomalies identified across four distinct domains of decision-making: choice under risk, choice … risk and ambiguity, belief updating, and survey expectations. Our framework makes predictions that we test using exogenous …

shocks to aggregate uncertainty, I introduce a small, time-varying risk of economic disaster in a standard real business … risk of disaster does not affect the path of macroeconomic aggregates - a "separation theorem" between macroeconomic … variation in risk premia over time, are observationally equivalent to preference shocks. An increase in the perceived …