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Altruism, social interactions, and the course of a pandemic

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  • Alfaro, Laura
  • Faia, Ester
  • Lamersdorf, Nora
  • Saidi, Farzad

Abstract

Externalities and social preferences, such as altruism, play a key role in the choice of social interactions, which in turn affect the diffusion of a pandemic. We build a dynamic epidemiological model with endogenous social interactions in a frictional environment, also in a variant with heterogeneous agents and a network structure. Taking into account agents’ endogenous behavior and altruism generates markedly different predictions relative to a naïve epidemiological model with exogenous contact rates. Congestion and commitment inefficiencies arise, even under full altruism, and call for policy intervention. We derive the efficient allocation, and show how the Ramsey planner can mitigate the respective externalities.

Suggested Citation

  • Alfaro, Laura & Faia, Ester & Lamersdorf, Nora & Saidi, Farzad, 2024. "Altruism, social interactions, and the course of a pandemic," European Economic Review, Elsevier, vol. 161(C).
  • Handle: RePEc:eee:eecrev:v:161:y:2024:i:c:s0014292123002532
    DOI: 10.1016/j.euroecorev.2023.104625
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    Cited by:

    1. Fang, Ximeng & Freyer, Timo & Ho, Chui-Yee & Chen, Zihua & Goette, Lorenz, 2022. "Prosociality predicts individual behavior and collective outcomes in the COVID-19 pandemic," Social Science & Medicine, Elsevier, vol. 308(C).
    2. Laura Alfaro & Ester Faia & Nora Lamersdorf & Farzad Saidi, 2022. "Health Externalities and Policy: The Role of Social Preferences," Management Science, INFORMS, vol. 68(9), pages 6751-6761, September.

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    More about this item

    Keywords

    Social interactions; Pandemics; SIR models; Social preferences; Targeted policies;
    All these keywords.

    JEL classification:

    • D62 - Microeconomics - - Welfare Economics - - - Externalities
    • D64 - Microeconomics - - Welfare Economics - - - Altruism; Philanthropy; Intergenerational Transfers
    • D85 - Microeconomics - - Information, Knowledge, and Uncertainty - - - Network Formation
    • D91 - Microeconomics - - Micro-Based Behavioral Economics - - - Role and Effects of Psychological, Emotional, Social, and Cognitive Factors on Decision Making
    • E70 - Macroeconomics and Monetary Economics - - Macro-Based Behavioral Economics - - - General
    • I10 - Health, Education, and Welfare - - Health - - - General
    • I18 - Health, Education, and Welfare - - Health - - - Government Policy; Regulation; Public Health

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