Uncertainty Shocks and Balance Sheet Recessions
Uncertainty Shocks and Balance Sheet Recessions Sebastian Di Tella∗ MIT Job Market Paper December, 2012 Abstract This paper investigates the origin and propagation of balance sheet recessions in a continuous-time general equilibrium model with financial frictions. I first show that in standard models driven by TFP shocks, the balance sheet channel completely disap- pears when agents are allowed to write contracts on the aggregate state of the economy. Financial frictions still affect the economy, but optimal contracts sever the link between leverage and aggregate risk sharing, eliminating the excessive exposure to aggregate risk that drives balance sheet recessions. As a result, balance sheets play no role in the trans- mission and amplification of aggregate shocks. Motivated by this neutrality result, I consider alternative structural shocks. I show that uncertainty shocks can drive bal- ance sheet recessions, with depressed growth and asset prices, and trigger a “flight to quality” event, with low interest rates and high risk premia. Uncertainty shocks create an endogenous hedging motive, inducing agents to take on aggregate risk even when contracts can be written on the aggregate state of the economy. Finally, I explore the implications for financial regulation. JEL Codes: E32, E44, G1, G12 ∗I am extremely grateful to my advisors Daron Acemoglu, Guido Lorenzoni, and Ivan Werning for their invaluable guidance. I also thank George-Marios Angeletos, Vladimir Asriyan, Ricardo Caballero, Marco Di Maggio, David Gamarnik, Veronica Guerrieri, Leonid Kogan, Andrey Malenko, William Mullins, Juan Passadore, Mercedes Politi, Felipe Severino, Rob Townsend, Victoria Vanasco, Xiao Yu Wang, Juan Pablo Xandri, Luis Zermeño, and seminar participants at the MIT Macroeconomics Lunch for useful suggestions and comments.
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