Total pollution emitted by U.S. manufacturers declined over the past 30 years by about 60 percent, even though real manufacturing output increased 70 percent. This improvement must result from a combination of two trends: (1) changes in production or abatement processes ("technology"); or (2)...

We estimate the respective contributions of institutions, geography, and trade in determining income levels around the world, using recently developed instruments for institutions and trade. Our results indicate that the quality of institutions trumps' everything else. Once institutions are...

This paper assesses two theories regarding the historical determinants of international differences in financial development. The law and finance theory holds that legal traditions differ in terms of the priority they attach to protecting the rights of private investors vis-a-vis the State and...

We present new archival evidence on the price of vacant land in New York City between 1835 and 1900. Before the Civil War, the price of land per square foot fell steeply with distance from New York's City Hall located in the central business district. After the Civil War, the distance gradient...

We examine the importance of geographical proximity to coal as a factor underpinning comparative European economic development during the Industrial Revolution. Our analysis exploits geographical variation in city and coalfield locations, alongside temporal variation in the availability of...

"Site selection bias" can occur when the probability that a program is adopted or evaluated is correlated with its impacts. I test for site selection bias in the context of the Opower energy conservation programs, using 111 randomized control trials involving 8.6 million households across the...

Recent evidence on the large variance in teacher effectiveness has spurred renewed interest in teacher labor market policies. A substantial body of prior research documents that more highly qualified teachers tend to work in more advantaged schools, although this literature cannot determine the...