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Monetary Policy and Bubbles in a New Keynesian Model with Overlapping Generations

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  • Jordi Galí

Abstract

I analyze an extension of the New Keynesian model that features overlapping generations of finitely- lived agents and (stochastic) transitions to inactivity. In contrast with the standard model, the proposed framework allows for the existence of rational expectations equilibria with asset price bubbles. I study the conditions under which bubble-driven fluctuations may emerge and the type of monetary policy rules that may prevent them. I conclude by discussing some of the model's welfare implications.

Suggested Citation

  • Jordi Galí, 2017. "Monetary Policy and Bubbles in a New Keynesian Model with Overlapping Generations," Working Papers 959, Barcelona School of Economics.
    • Handle: RePEc:bge:wpaper:959
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    Cited by:

    1. Junming Chen, 2025. "Monetary Policy, Financing Constraints, and Rational Asset Price Bubbles," Discussion Papers 25/04, Department of Economics, University of York.
    2. Alberto Martin & Jaume Ventura, 2018. "The Macroeconomics of Rational Bubbles: A User's Guide," Annual Review of Economics, Annual Reviews, vol. 10(1), pages 505-539, August.
    3. Bonchi, Jacopo & Nisticò, Salvatore, 2024. "Optimal monetary policy and rational asset bubbles," European Economic Review, Elsevier, vol. 170(C).
    4. Marcin Bielecki & Michał Brzoza-Brzezina & Marcin Kolasa, 2022. "Intergenerational Redistributive Effects of Monetary Policy [Price-Level Changes and the Redistribution of Nominal Wealth Across the Euro Area]," Journal of the European Economic Association, European Economic Association, vol. 20(2), pages 549-580.
    5. Hoshino, Satoshi & Ida, Daisuke, 2025. "Stock prices and monetary policy: Analysis of a Bayesian DSGE model," Economic Modelling, Elsevier, vol. 148(C).
    6. Michau, Jean-Baptiste & Ono, Yoshiyasu & Schlegl, Matthias, 2023. "Wealth preference and rational bubbles," European Economic Review, Elsevier, vol. 156(C).
    7. Jacopo Bonchi, 2023. "Asset Price Bubbles and Monetary Policy: Revisiting the Nexus at the Zero Lower Bound," Review of Economic Dynamics, Elsevier for the Society for Economic Dynamics, vol. 47, pages 186-203, January.
    8. Altermatt, Lukas, 2019. "Savings, asset scarcity, and monetary policy," Journal of Economic Theory, Elsevier, vol. 182(C), pages 329-359.
    9. Bosi, Stefano & Le Van, Cuong & Pham, Ngoc-Sang, 2022. "Real indeterminacy and dynamics of asset price bubbles in general equilibrium," Journal of Mathematical Economics, Elsevier, vol. 100(C).
    10. Ruguo Fan & Xiao Xie & Yuanyuan Wang & Jinchai Lin, 2025. "Effect of financial contagion between real and financial sectors on asset bubbles: A two‐layer network game approach," Managerial and Decision Economics, John Wiley & Sons, Ltd., vol. 46(1), pages 393-408, January.
    11. Anton Nakov & Roberto M. Billi & Jordi Galí, 2022. "Optimal Monetary Policy with r," Working Papers 1333, Barcelona School of Economics.
    12. Duan, Kun & Zhang, Liya & Chen, Shuyun & Urquhart, Andrew, 2025. "Heterogeneous housing bubbles and monetary policy," International Review of Financial Analysis, Elsevier, vol. 103(C).
    13. Shim, Jae Hun, 2025. "Bubbles, banking and monetary policy," Journal of Financial Stability, Elsevier, vol. 76(C).
    14. George‐Marios Angeletos & Chen Lian & Christian K. Wolf, 2024. "Can Deficits Finance Themselves?," Econometrica, Econometric Society, vol. 92(5), pages 1351-1390, September.
    15. Takahashi, Yuta & Takayama, Naoki, 2025. "A parsimonious model for zero inflation at the zero lower bound," Economics Letters, Elsevier, vol. 247(C).
    16. Anufriev, Mikhail & Lamantia, Fabio & Radi, Davide & Tichy, Tomas, 2025. "Leaning against the wind in the New Keynesian model with heterogeneous expectations," Journal of Economic Dynamics and Control, Elsevier, vol. 172(C).

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    Keywords

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    JEL classification:

    • E44 - Macroeconomics and Monetary Economics - - Money and Interest Rates - - - Financial Markets and the Macroeconomy
    • E52 - Macroeconomics and Monetary Economics - - Monetary Policy, Central Banking, and the Supply of Money and Credit - - - Monetary Policy

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