Macro-Finance

Macro-finance addresses the link between asset prices and economic fluctuations. Many models reflect the same rough idea: the market's ability to bear risk is greater in good times, and less in bad times. Models achieve this similar result by quite different mechanisms. I contrast their strengths and weaknesses. I highlight directions for future research, including additional facts to be matched, and limitations of the models that should prod future theoretical work. I describe how macro-finance models can fundamentally alter macroeconomics, by putting time-varying risk premiums and risk-bearing capacity at the center of recessions rather than variation in the interest rate and intertemporal substitution.