Despite widespread popular accounts linking crack cocaine to inner-city decay systematic research has analyzed the …

-third of manufacturing employment volatility at the city level. Local spillovers do not appear to result from transport costs …

discrete choice model allows for city-specific labor and housing markets, rather than assuming a national market; (3) the …

We investigate the relationship between the opening of a city's subway network and its air quality. We find that … particulate concentrations drop by 4% in a 10km radius disk surrounding a city center following a subway system opening. The … effect is larger near the city center and persists over the longest time horizon that we can measure with our data, about …

and social frictions influence restaurant visits within New York City. Transit time plays a first-order role in … restaurant consumption in New York City is only about half as segregated as residences. Consumption segregation owes more to …

New, "big" data sources allow measurement of city characteristics and outcome variables higher frequencies and finer … in New York City, suggesting that similar image data can be used to map wealth and poverty in previously unmeasured areas … urban amenities. Finally, we explain how Internet data is being used to improve the quality of city services …

typhoid fatality rates during early life as a proxy for water quality. To carry out the analysis, city-level data are merged …