Online shopping surged in the initial months of the COVID-19 pandemic, accelerating the pre-pandemic shift toward increased online consumer activity. This trend fed into concerns over the success of top retailers at the expense of smaller ones. Further, it raised questions of whether consumers...

To assess age-specific infection fatality rates (IFRs) for COVID-19, we have conducted a systematic review of seroprevalence studies as well as countries with comprehensive tracing programs. Age-specific IFRs were computed using the prevalence data in conjunction with reported fatalities four...

Objectives. We investigated the association of pre-existing economic variables with COVID-19 infections and mortality in New York City.Methods. We combined zip code-level data from New York City's Department of Health with 5-year American Community Survey. We estimated ordinary least squares...

New York City has seen a great deal of COVID-19 cases and deaths since the first positive test in March. This paper analyzes ZIP-code level COVID-19 outcomes with 2018 American Community Survey neighborhood data. I find residents of poor ZIP-codes and ZIP-codes with a greater fraction of the...

We study optimal dynamic lockdowns against Covid-19 within a commuting network. Our framework integrates canonical spatial epidemiology and trade models, and is applied to cities with varying initial viral spread: Seoul, Daegu and NYC-Metro. Spatial lockdowns achieve substantially smaller income...

During the COVID-19 pandemic, each state dealt with the pandemic in different ways. At the two ends of the strictness spectrum of containment policies are New York and Texas, which had very different ways of dealing with the COVID-19. Much literature has been published comparing COVID-19...