This paper uses decennial Census data to examine trends in immigrant segregation in the United States between 1910 and 2000. Immigrant segregation declined in the first half of the century, but has been rising steadily over the past three decades. Analysis of restricted access 1990 Census...

Suicide rates among youths aged 15-24 have tripled in the past half-century, even as rates for adults and the elderly have declined. And for every youth suicide completion, there are nearly 400 suicide attempts. This paper examines the dynamics of youth suicide attempts and completions, and...

Americans have become considerably more obese over the past 25 years. This increase is primarily the result of consuming more calories. The increase in food consumption is itself the result of technological innovations which made it possible for food to be mass prepared far from the point of...

The Social capital literature documents a connection between social connection and economic outcomes of interest ranging from government quality to economic growth. Popular authors suggest that housing and architecture are important determinants of social connection. This paper examines the...

Over the past 30 years, the share of adult populations with college degrees increased more in cities with higher initial schooling levels than in initially less educated places. This tendency appears to be driven by shifts in labor demand as there is an increasing wage premium for skilled people...

This tribute to Jane Jacobs connects some of her ideas on cities and her work on ethical systems. In particular, I present data suggesting that ethical norms do substantially differ between big cities and small towns. These findings motivate a model showing cities tend to limit the ability of...

A large body of recent research argues that social, or non-market, interactions can explain a wide range of puzzling phenomena from fashion cycles to stock market crashes. This paper attempts to connect the range of these papers with a general model and a broad empirical overview. We establish...

America is a nation filled with guns and gunowners. Using the General Social Survey, we investigate who owns guns. Gunowners resemble neither criminals nor victims, although they do hunt. Waiting periods appear to have little effect on the overall level of gun ownership, but they do lower the...

This paper examines the decentralization of employment using zip code data on employment by industry. Most American cities are decentralized--on average less than 16 percent of employment in metropolitan areas is within a three mile radius of the city center. In decentralized cities, the classic...