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In the United States, the reluctance of the federal government to impose a national stayâ€atâ€home policy in wake of COVIDâ€19 pandemic has left the decision of how to achieve social distancing to individual state governors. We hypothesized that in the absence of formal guidelines, the decision to close a state reflects the classic Weberâ€Fechner law of psychophysics – the amount by which a stimulus (such as number of cases or deaths) must increase in order to be noticed as a fraction of the intensity of that stimulus.
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