The effects of uncertainty shocks: Implications of wealth inequality

This paper investigates whether and how the effects of time-varying macroeconomic uncertainty depend on the distribution of wealth. I show that increases in wealth inequality amplify the responses to uncertainty shocks. Using deciles of the distribution of wealth along with a series of macroeconomic volatility for the United States, I find that consumption growth falls by approximately 0.25 percentage points more in response to a one standard deviation uncertainty shock when wealth inequality is high relative to when it is low. In order to understand the nonlinear effects of uncertainty on consumption growth, I consider a two-agent New Keynesian model. I calibrate this simple model to qualitatively match the empirical responses of consumption growth to a one standard deviation uncertainty shock and show that nominal rigidities are key to magnifying the effects of uncertainty under high wealth inequality.