ArgumentFrameworkMacro and rates
Did rate hikes bring inflation down, or did the shocks fade? The careful answer is both
The contribution of monetary policy to disinflation · 2023
The idea
Interviewers in macro, rates and research roles ask whether the 2022 tightening worked. The BIS bulletin gives a two-sided answer. The inflation surge was nearly twice a typical outbreak, and in the 1970s the disinflation that followed such surges was only half as large as the rise. Short-term expectations rose from mid-2021, then plateaued and fell once tightening accelerated in mid-2022. The estimated response of inflation to demand is small, so hikes alone could not have cut it by several points without a deep recession. But in the counterfactual without hikes, real rates fall sharply and keep inflation high. The supply shocks faded; policy stopped them from becoming entrenched.
Supply shocks faded on their own; the hikes anchored expectations so the fading could happen. Credit both, in that order.
When it works
Macro and rates interviews, and any debate about central bank credibility.
When it may fail
Counterfactuals come from models, and the response of expectations to policy is itself estimated. The bulletin is careful; a candidate repeating it should be too.
How to use it
Answer in two halves: name the supply shocks and their timing, then the expectations channel and what the counterfactual shows. An answer that credits only one half is the answer the interviewer is waiting to push on.
Where it came from
Research The contribution of monetary policy to disinflation · Pongpitch Amatyakul, Fiorella De Fiore, Marco Lombardi, Benoit Mojon and Daniel Rees, Bank for International Settlements (BIS Bulletin No 82)
What the source says. Short-term inflation expectations plateaued and fell once tightening accelerated in mid-2022; the response of inflation to real activity is very small; without hikes, counterfactual real rates fall sharply and keep inflation high.
Connected ideas
Says something similar
The near end of the curve carries the recession signal, not the long endAn inverted curve is the market expecting cuts; read the near-term forward spread, because the long spread is diluted by the term premium.
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