What the study found
The study finds that unfunded fiscal shocks, meaning fiscal expansions not matched by new funding, were not the main drivers of inflation in Japan over the past four decades. Instead, the authors report that real demand and supply shocks, along with accommodative monetary policy, played more important roles in inflation dynamics.
Why the authors say this matters
The authors frame this as important because Japan had sustained fiscal expansion and rising debt since the 1990s, yet inflation stayed low until recent years. The study suggests this pattern is different from the U.S. case and that the authors conclude fiscal factors alone do not explain Japan’s inflation experience.
What the researchers tested
The researchers estimated a medium-scale DSGE model, or dynamic stochastic general equilibrium model, developed by Bianchi et al. using Japanese data. They used the model to examine how fiscal factors contributed to inflation in Japan over roughly four decades.
What worked and what didn't
The model-based analysis found that unfunded fiscal shocks were not the main source of Japan’s inflation. Real demand shocks, supply shocks, and accommodative monetary policy were more significant in shaping inflation dynamics according to the study.
What to keep in mind
The abstract does not describe detailed limitations beyond the model-based approach and the use of Japanese data. It also does not provide uncertainty estimates or discuss how strongly each factor contributed relative to the others.
Key points
- The study examines fiscal factors and inflation in Japan over the past four decades.
- Unfunded fiscal shocks were not found to be the main drivers of inflation in Japan.
- Real demand and supply shocks, plus accommodative monetary policy, were more important in the model results.
- The authors contrast Japan’s experience with the U.S. case.
- Japan’s sustained fiscal expansion and rising debt did not coincide with high inflation until recent years.
Disclosure
- Research title:
- Unfunded fiscal shocks were not the main driver of Japan’s inflation
- Authors:
- Takeki Sunakawa
- Institutions:
- Hitotsubashi University
- Publication date:
- 2026-04-06
- OpenAlex record:
- View
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