This chapter reviews and synthesizes our current understanding of the shocks that drive economic fluctuations. The chapter begins with an illustration of the problem of identifying macroeconomic shocks, followed by an overview of the many recent innovations for identifying shocks. It then...

This paper empirically tests the importance of the credit channel in the transmission of monetary policy. Three credit variables are analyzed: total bank loans, bank holdings of securities relative to loans, and the difference in the growth rate of short-term debt of small and large firms. In...

The microeconomic foundation of the theory of money has long represented a puzzle to economic theory. Why is there Money? derives the foundations of monetary theory from advanced price theory in a mathematically precise family of trading post models. It has long been recognized that the...