Economic advisor and economist
Curriculum Vitae (February 23, 2017)
The Paper Trail of Knowledge Flows: Evidence from Patent Interferences
Natural Amenities, Neighborhood Dynamics, and Persistence in the Spatial Distribution of Income
What Have We Learned About the Causes of Recent Gentrification?
Thick Markets and Churning in the Labor Market: Evidence from U.S. Cities
Portage and Path Dependence
Precision, Bias, and Uncertainty for State Population Forecasts: An Exploratory Analysis of Time Series Models
Gentrification and Transit in Northwest Chicago
Non-technical articles written for general audiences
The Puzzling Persistence of Place
I explore the remarkable persistence of urban development patterns over decades, centuries, or even millennia. Is such extreme persistence desirable? What does it imply about today's "place-making" policies?
The Paper Trail of Knowledge Transfers
Why do firms tend to locate near other firms? Economists suspect that geographic clustering spurs innovation by letting businesses tap a climate rich in informal transfers of knowledge. By tracing links between inventors filing for patents for the same inventions, I review new evidence supporting the idea that proximity offers businesses tangible benefits.
Geography, History, Economies of Density, and the Location of Cities
What determines the location of cities? I review evidence on the roles of natural amenities, history dependence, and economies of density in explaining the the location and sizes of cities.
Urban Productivity Advantages from Job Search and Matching
Why do workers earn higher wages in big cities? One intriguing hypothesis is that agglomeration economies from job search and matching contribute to higher productivity in densely populated areas. I describe recent evidence and ask whether advantages from job search and matching are large enough to offer meaningful explanations for differences in productivity across cities.
Data on new occupation titles and codes ("new work") in the Dictionary of Occupational Titles, 1964, 1977, 1991, and the US Census, 1980, 1990, and 2000. Used in "Technological Adaptation, Cities, and New Work" (2011), Review of Economics and Statistics 93 (2): 554-574.