Rethinking Short-Term Real Interest Rates and Term Spreads Using Very Long-Run Data

Kenneth Rogoff, Barbara Rossi and Paul Schmelzing

No 33079, NBER Working Papers from National Bureau of Economic Research, Inc

Abstract: Utilizing critical recent data advances, we analyze empirical evidence on long-run samples of short-maturity real interest rates as well as term spreads based on multi-century data. In contrast to an extensive literature on short-maturity real interest rates over the past few decades, we find strong and consistent evidence of trend stationarity in long horizon series, relatively fast adjustment speeds, and a paucity of structural breaks – results that we show to survive out of sample tests. The use of very long-run data offers a fresh perspective for ongoing monetary policy debates surrounding r*, and also provides a crucial missing link to reconstructing the long-run properties of term spreads. On balance and against limited post-COVID data, our evidence suggests caution on the idea of a break in short-term real interest rate behavior and instead points to elements of continuity over very long time periods. Relatedly, we show that term spreads are secularly rising while inflation volatility trends in the exact opposite direction – a finding questioning the emphasis of influential term structure models.

JEL-codes: F3 N20 (search for similar items in EconPapers)
Date: 2024-10
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