This paper examines city formation in a country whose urban population is growing steadily over time, with new cities … assets cities form sequentially, without the population swings in existing cities that arise in current models, but with … urban externalities vary with population. Efficient formation of cities with internalization of externalities involves local …

Will improvements in information technology eliminate face-to- face interactions and make cities obsolete? In this … their interactions. Cities are modeled as a means of reducing the fixed travel costs involved in face-to-face interactions …. When telecommunications technology improves, there are two opposing effects on cities and face-to-face interactions: some …

of employment initially in manufacturing. These results are qualitatively unchanged if we examine cities (a smaller … uncorrelated with urban growth across all cities, but that in communities with large nonwhite communities segregation is positively …

we discuss important findings from the literature about why this is so. We highlight the traits of cities (e.g., size …