Coronavirus and the Cities: Explaining Variations in the Onset of Infection and in the Number of Reported Cases and Deaths in U.S. Metropolitan Areas as of 27 March 2020 [open pdf - 0B]
From the Introduction: "We can now begin to explain the geographic variations in the date of the onset of infections, in the number of confirmed cases, and in the number of deaths from the Coronavirus. Instead of focusing on states or on counties, we focus on cities, and more specifically on Metropolitan Statistical Areas (MSAs) in the United States. [...] The question that many of us are asking is 'why do some U.S. metropolitan areas have more infections and more deaths than others?' A number of conjectures have been advanced. The governor of the state of New York, Andrew Cuomo, for example, conjectured on 26 March that New York has more cases than any other city because it is dense and because it is an international gateway. This is a hypothesis that can now be tested with data. We have tried to answer three related questions:  Why did some cities encounter Coronavirus infections earlier than others?  Why do some cities have more confirmed cases of Coronavirus infections than others? [and 3] Why do some cities have more deaths from the Coronavirus than others?"
NYU Marron Institute of Urban Management
NYU Marron Institute of Urban Management: https://marroninstitute.nyu.edu/