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A Simple Mapping from MPCs to MPXs

Author

Listed:
  • David Laibson
  • Peter Maxted
  • Benjamin Moll

Abstract

Standard consumption models assume a notional consumption flow that does not distinguish between nondurable and durable consumption. Such notional-consumption models generate notional marginal propensities to consume (MPC). By contrast, empirical work and policy discussions often highlight marginal propensities for expenditure (MPX), which incorporate spending on a durable stock. We compare the notional-consumption model to an isomorphic model with a durable stock, and map notional MPCs into MPXs. The mapping is especially simple for a one-period horizon: MPX = (1 - s + s/(r+d)) x MPC, with durable share s, real interest rate r, and durable depreciation rate d.

Suggested Citation

  • David Laibson & Peter Maxted & Benjamin Moll, 2022. "A Simple Mapping from MPCs to MPXs," NBER Working Papers 29664, National Bureau of Economic Research, Inc.
    • Handle: RePEc:nbr:nberwo:29664
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    Cited by:

    1. Gelman, Michael & Orlando, Zachary & Patki, Dhiren, 2025. "The impact of unexpected delays in periodic payments on consumption," Journal of Public Economics, Elsevier, vol. 252(C).
    2. Böjeryd, Jesper & Vestman, Roine & Tyrefors, Björn & Kessel, Dany, 2026. "The housing wealth effect: Quasi-experimental evidence," Journal of Monetary Economics, Elsevier, vol. 158(C).
    3. Andre, Peter & Flynn, Joel P. & Nikolakoudis, George & Sastry, Karthik A., 2024. "Quick-fixing: Near-rationality in consumption and savings behavior," SAFE Working Paper Series 434, Leibniz Institute for Financial Research SAFE.
    4. Partsch, Emil Holst & Petrella, Ivan & Santoro, Emiliano, 2026. "Consumer durables and monetary policy according to HANK," Journal of Monetary Economics, Elsevier, vol. 157(C).
    5. Bartal, Mehdi & Becard, Yvan, 2024. "Consumption tax cuts vs stimulus payments," Journal of Public Economics, Elsevier, vol. 239(C).
    6. Sean Chanwook Lee & Omeed Maghzian, 2023. "Household Liquidity and Macroeconomic Stabilization: Evidence from Mortgage Forbearance," Working Papers 23-12, Federal Reserve Bank of Boston.
    7. Winfried Koeniger & Peter Kress, 2024. "The Effect of Unconventional Fiscal Policy on Consumption – New Evidence Based on Transactional Data," CESifo Working Paper Series 11440, CESifo.
    8. Kirill Borusyak & Xavier Jaravel & Jann Spiess, 2024. "Revisiting Event-Study Designs: Robust and Efficient Estimation," The Review of Economic Studies, Review of Economic Studies Ltd, vol. 91(6), pages 3253-3285.
    9. Yunho Cho & James Morley & Aarti Singh, 2024. "Did marginal propensities to consume change with the housing boom and bust?," Journal of Applied Econometrics, John Wiley & Sons, Ltd., vol. 39(1), pages 174-199, January.

    More about this item

    JEL classification:

    • C82 - Mathematical and Quantitative Methods - - Data Collection and Data Estimation Methodology; Computer Programs - - - Methodology for Collecting, Estimating, and Organizing Macroeconomic Data; Data Access
    • D11 - Microeconomics - - Household Behavior - - - Consumer Economics: Theory
    • D15 - Microeconomics - - Household Behavior - - - Intertemporal Household Choice; Life Cycle Models and Saving
    • E21 - Macroeconomics and Monetary Economics - - Consumption, Saving, Production, Employment, and Investment - - - Consumption; Saving; Wealth
    • E60 - Macroeconomics and Monetary Economics - - Macroeconomic Policy, Macroeconomic Aspects of Public Finance, and General Outlook - - - General
    • E62 - Macroeconomics and Monetary Economics - - Macroeconomic Policy, Macroeconomic Aspects of Public Finance, and General Outlook - - - Fiscal Policy; Modern Monetary Theory
    • G50 - Financial Economics - - Household Finance - - - General
    • H31 - Public Economics - - Fiscal Policies and Behavior of Economic Agents - - - Household

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