HEC Research Papers Series,
HEC Paris

Abstract: We study beliefs about fiscal dominance in a survey of German households. We first use a randomized controlled trial to identify how fiscal news impact individual debt-to-GDP and inflation expectations. We document that the link between debt and inflation crucially depends on individuals' views about the fiscal space. News leading individuals to expect higher debt-to-GDP ratios make them more likely to revise upward their inflation expectations. These average effects are due to individuals who think that fiscal resources are more stretched than others. In contrast, individuals who think there is fiscal space do not associate debt with inflation. We then rationalize these results in a New Keynesian model where agents have heterogeneous beliefs about the fiscal space. We show that the heterogeneity of beliefs implies a policy trade-off for the central bank. Agents who expect fiscal dominance in the future exert upward pressure on inflation. An active central bank may choose to partially tolerate this higher inflation due to the real costs of completely stabilizing prices.

Keywords: inflation expectations; fiscal and monetary policy; heterogeneous beliefs; randomized controlled trial; survey data

JEL-codes: D84; E31; E52; H60

78 pages, First version: March 25, 2025. Revised: March 25, 2025.

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