As COVID-19 ravaged the US in the first quarter of 2020, the US lacked a uniform mandatory policy for containing its spread. Governors facing enormous opposing pressures from businesses and medical professionals adopted various policies, especially lockdowns. The authors statistically analyze...

Lockdowns and stay-at-home orders in response to the Covid-19 pandemic have raised an urgent question in peoples’ minds, “How long must these restrictions last?” We propose two metrics of the spread of disease to answer this question: daily growth rate and time to double cumulative cases....

When faced with new technologies, the incumbents’ dilemma is whether to embrace the new technology, stick with their old technology, or invest in both. The entrants’ dilemma is whether to target a niche and avoid incumbent reaction or target the mass market and incur the incumbent’s wrath....