Zhihan Cui

School of International and Public Affairs
Columbia University
Program on Sustainable Development
New York, NY 10027

E-Mail: EmailAddress: hidden: you can email any NBER-related person as first underscore last at nber dot org
Institutional Affiliation: Columbia University

NBER Working Papers and Publications

May 2020Covid-19, Shelter-In Place Strategies and Tipping
with Geoffrey Heal, Howard Kunreuther: w27124
Social distancing via shelter-in-place strategies has emerged as the most effective way to combat Covid-19. In the United States, choices about such policies are made by individual states. Here we show that the policy choice made by one state influences the incentives that other states face to adopt similar policies: they can be viewed as strategic complements in a supermodular game. If they satisfy the condition of uniform strict increasing differences then following Heal and Kunreuther ([6]) we show that if enough states engage in social distancing, they will tip others to do the same and thus shift the Nash equilibrium with respect to the number of states engaging in social distancing.

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