How do the policies implemented by individual states in the US interact with each other and either reinforce or interfere with each other? Specifically what are the interactions of rest-in-place policies implemented by different states. Does the implementation of such policies in NY makes them more or less effective in NJ, and vice versa. We suggest that state-level stay-in-place policies reinforce each other and make each other more effective. So the incentive for any state to implement such a policy is greater, the more of its neighbors have implemented or plan to implement such policies. We model the choice of stay-in-place policies by states as a game between the states, study the equilibria of such a game, and examine the possibility of tipping the equilibria of such a game to ones where all states implement stay-in-place policies.
