Scandinavian Working Papers in Economics

Working Paper Series,
Sveriges Riksbank (Central Bank of Sweden)

No 390: The Role of Money in Monetary Policy at the Lower Bound

Roberto M. Billi (), Ulf Söderström () and Carl E. Walsh ()
Additional contact information
Roberto M. Billi: Research Department, Central Bank of Sweden, Postal: Sveriges Riksbank, SE-103 37 Stockholm, Sweden
Ulf Söderström: Research Department, Central Bank of Sweden, Postal: Sveriges Riksbank, SE-103 37 Stockholm, Sweden
Carl E. Walsh: University of California, Santa Cruz

Abstract: In light of the current low-interest-rate environment, we reconsider the merit of a money growth target (MGT) relative to a conventional ination targeting (IT) regime, and to the notion of price level targeting (PLT). Through the lens of a New Keynesian model, and accounting for a zero lower bound (ZLB) constraint on the nominal interest rate, we show, not surprisingly, that PLT performs best in terms of social welfare. However, the ranking between IT and MGT is not a foregone conclusion. In particular, although MGT makes monetary policy vulnerable to money demand shocks, it contributes to achieving price level stability and reduces the incidence and severity of the ZLB relative to both IT and PLT. We also show that MGT lessens the need for the scal authority to engage alongside the central bank in ghting recessions. To illustrate this scal bene t of MGT, we introduce a simple rule for the scal authority to raise government purchases when GDP falls below potential. If the government fails to make up for a substantial share of the shortfalls in GDP, then IT performs worse than MGT from the perspective of society.

Keywords: Friedmans k-percent rule; ZLB constraint; scal policy; automatic stabilizers

JEL-codes: E31; E42; E52

53 pages, June 1, 2020

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