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Authorized for public release by the FOMC Secretariat on 1/8/2021

THE FEDERAL RESERVE SYSTEM
Date:

October 13, 2015

To:

Federal Open Market Committee

From:

David Altig, Stephen A. Meyer, and Daniel G. Sullivan

Subject:

Background Material for r* Discussion

During the April FOMC meeting, a number of participants suggested that the
Committee should have a discussion of the meaning of r*, of its current level and how
its level might be expected to evolve, and of its implications for the Committee’s
policy decisions. The attached four memos, listed below, address these issues.
1. r*: Concepts, Measures, and Uses
2. Real Interest Rates Over the Long-Run
3. Estimates of Short-Run r* from DSGE Models
4. Monetary Policy at the Lower Bound with Imperfect Information about r*
The first of the four memos identifies various concepts of r*; it also discusses
the connection between r* and simple policy rules such as the Taylor rule. The
second memo focuses on factors that have contributed to persistent, longer-run,
movements in r*, and on empirical estimates of longer-run trends in r*. The third
memo focuses on shorter-term variations in r* using insights derived from research
on dynamic stochastic general equilibrium (DSGE) models; this memo emphasizes
the effect of economic disturbances on r* at business cycle frequencies. The fourth
memo addresses the policy implications of uncertainty about the level and persistence
of movements in r*; it includes a discussion of the implications of adjusting simple
rules by incorporating a time-varying intercept term that proxies for movements in r*.
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Authorized for public release by the FOMC Secretariat on 1/8/2021

Staff will provide short briefings on these four memos at the upcoming FOMC
meeting. Participants will have an opportunity to ask questions and to provide
comments (not a full go-round). If you would like to comment, it would be helpful if
you would address some or all of the following questions:
1. What does your estimate of the current level of r* imply for the degree of
accommodation provided by current monetary policy?
2. How, in your view, has r* been affected by recent changes in financial
conditions, especially by movements in the exchange value of the dollar?
3. How do you expect r* to evolve, and what are the implications for the
appropriate path of policy going forward?

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