R-Star: A new approach to estimate the polar star of monetary policy

Peter Bofinger and Thomas Haas

No 18420, CEPR Discussion Papers from Centre for Economic Policy Research

Abstract: The necessary adjustments to prominent measures of the neutral rate of interest following the COVID pandemic sparked a wide-ranging debate on the measurement and usefulness of r-star. Due to high uncertainty about relevant determinants, trend patterns and the correct estimation method, we propose in this paper a simple alternative approach derived from a standard macro model. Starting from a loss function, neutral periods can be determined in which a neutral real interest rate is observable. Using these values, a medium- to long-term trend for a neutral interest rate can be determined. An application to the USA shows that our simple calculation of a neutral interest rate delivers comparable results to existing studies. A Taylor rule based on our neutral interest rate also does a fairly good job of explaining US monetary policy over the past 60 years.

Keywords: Neutral; rate; of; interest (search for similar items in EconPapers)
JEL-codes: E3 E4 E5 (search for similar items in EconPapers)
Date: 2023-09
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Working Paper: R-star: A new approach to estimate the polar star of monetary policy (2023)
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