Monetary Policy and the Maturity Structure of Public Debt

Abstract

This paper studies the mediating impact of the maturity of public debt in the transmission of monetary policy shocks to economic activity. A longer debt maturity attenuates greatly the effect of monetary policy: going from the average historical duration of US debt to very short term debt doubles the impact of a rise of the policy rate on output. A similar result holds in UK data. Using data on corporate debt, spreads, investment, and fiscal variables, I show that these effects can be traced back to a quantitatively important financing channel. A model featuring an interaction between an empirically estimated primary market friction and a standard financial accelerator is able to account for these facts.

Keywords: monetary policy transmission, public debt management, maturity structure, primary market friction

JEL Classification: E52, E62, E63, G20, H32, H63