The Working Capital Channel and Cross-Sector Comovement
This paper studies cross-sector comovement, one of the defining characteristics of the business cycle, in a monetary framework. We argue that monetary factors might be important for understanding this phenomenon through a working capital channel. We show that in a sticky portfolio adjustment model where firms borrow to finance working capital, a positive money supply shock drives the nominal interest rate down, thereby stimulating firms' borrowing and causing employment to rise in different sectors. A positive aggregate technology shock can also drive the nominal interest rate down upon impact and induce comovement when the elasticity of labor supply is large.
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