We study a dynamic stochastic general equilibrium model in which agents are concerned about model uncertainty regarding … from climate change to damages is subject to uncertainty, and we use robust control theory techniques to study efficiency … dynamic optimal taxation. A small increase in the concern about model uncertainty can cause a significant drop in optimal …

managers are risk averse, they might underinvest when firm-specific uncertainty increases, leading to suboptimal investment …

A consumption-based asset pricing model with risk and uncertainty implies that the time-varying exposures of equity … portfolios to the market and uncertainty factors carry positive risk premiums. The empirical results from the size, book … (individual stocks) with market and uncertainty predict the time series and cross-sectional variation in stock returns. We find …

Using a new-Keynesian model with endogenous capital accumulation, I show that uncertainty about fiscal policy can cause … monetary authority is not constrained by the ZLB. I study uncertainty about the level of government spending and uncertainty … about tax rates on consumption, wages, capital income, and investment. In my model, uncertainty about government spending …