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Fiscal stimulus with supply constraints

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Abstract

This paper provides a framework to study the macroeconomic implications of supply constraints. Supply constraints hamper firms' ability to scale up production in response to surges in demand, disconnect prices from wages, and create non-linearities and instability in the aggregate Phillips curve. I use the model to show that binding supply constraints amplify the rise in inflation caused by a fiscal stimulus. This happens when the stimulus is large but transitory, when supply disruptions create shortages of intermediate inputs, and when public expenditure targets a few sectors of the economy. A persistent fiscal stimulus, instead, may boost firms' investment and productivity growth in the medium run, while having only a transitory impact on inflation.

Suggested Citation

  • Luca Fornaro, 2025. "Fiscal stimulus with supply constraints," Economics Working Papers 1922, Department of Economics and Business, Universitat Pompeu Fabra.
    • Handle: RePEc:upf:upfgen:1922
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    1. Benjamin Born & Francesco D’Ascanio & Gernot J. Müller & Johannes Pfeifer, 2024. "Mr. Keynes Meets the Classics: Government Spending and the Real Exchange Rate," Journal of Political Economy, University of Chicago Press, vol. 132(5), pages 1642-1683.
    2. Ethan Ilzetzki, 2024. "Learning by Necessity: Government Demand, Capacity Constraints, and Productivity Growth," American Economic Review, American Economic Association, vol. 114(8), pages 2436-2471, August.
    3. Benigno, Pierpaolo & Eggertsson, Gauti, 2023. "It's Baaack: The Surge in Inflation in the 2020s and the Return of the Non-Linear Phillips Curve," CEPR Discussion Papers 18116, C.E.P.R. Discussion Papers.
    4. Francesco Bianchi & Renato Faccini & Leonardo Melosi, 2023. "A Fiscal Theory of Persistent Inflation," The Quarterly Journal of Economics, President and Fellows of Harvard College, vol. 138(4), pages 2127-2179.
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    JEL classification:

    • E22 - Macroeconomics and Monetary Economics - - Consumption, Saving, Production, Employment, and Investment - - - Investment; Capital; Intangible Capital; Capacity
    • E31 - Macroeconomics and Monetary Economics - - Prices, Business Fluctuations, and Cycles - - - Price Level; Inflation; Deflation
    • E62 - Macroeconomics and Monetary Economics - - Macroeconomic Policy, Macroeconomic Aspects of Public Finance, and General Outlook - - - Fiscal Policy; Modern Monetary Theory
    • O31 - Economic Development, Innovation, Technological Change, and Growth - - Innovation; Research and Development; Technological Change; Intellectual Property Rights - - - Innovation and Invention: Processes and Incentives
    • O42 - Economic Development, Innovation, Technological Change, and Growth - - Economic Growth and Aggregate Productivity - - - Monetary Growth Models

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