Empirical studies of social interactions address a multitude of de¯nitional, econo- metric and measurement issues associated with role of interpersonal and social group in°uences in economic decisions. Applications range from studies of crime patterns, neighborhood in°uences on upbringing and...

This paper evaluates the relationship between urban productivity and density using data on metropolitan areas. This is an alternative measure of the urban economy to the one employed by Ciccone and Hall (1996), who use data on output and education by state and employment and education by county,...

We test implications of econom c geography models for location,size and growth of cities with US Census data for 1900 - 1990. Our tests involve non-parametr c estimations of stochastic kernels for the distributions of city sizes and growth rates, conditional on various measures of market...