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Rational Disinhibition And Externalities In Prevention

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  • Flavio Toxvaerd

Abstract

This article studies a model of disease propagation in which rational and forward‐looking individuals can control their exposure to infection by engaging in costly preventive behavior. Equilibrium outcomes under decentralized decision making are characterized and contrasted to the outcomes chosen by a social planner. In general, individuals overexpose themselves to infection, leading to suboptimally high disease prevalence. The model is applied to study the welfare effects of preexposure prophylaxis, which reduces transmission between serodiscordant couples and causes disinhibition. It is shown that a decrease in the induced infection risks increases disease prevalence and can lead to decreases in overall welfare.

Suggested Citation

  • Flavio Toxvaerd, 2019. "Rational Disinhibition And Externalities In Prevention," International Economic Review, Department of Economics, University of Pennsylvania and Osaka University Institute of Social and Economic Research Association, vol. 60(4), pages 1737-1755, November.
    • Handle: RePEc:wly:iecrev:v:60:y:2019:i:4:p:1737-1755
    DOI: 10.1111/iere.12402
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