NATIONAL BUREAU OF ECONOMIC RESEARCH
NATIONAL BUREAU OF ECONOMIC RESEARCH
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Laurent Gobillon

Paris School of Economics - CNRS
48 Boulevard Jourdan
75014 Paris
FRANCE

E-Mail: laurent.gobillon@psemail.eu
Institutional Affiliation: Paris School of Economics-CNRS

NBER Working Papers and Publications

November 2019Delineating Urban Areas Using Building Density
with Marie-Pierre de Bellefon, Pierre-Philippe Combes, Gilles Duranton, Clément Gorin: w26482
We develop a new dartboard methodology to delineate urban areas using detailed information about building location, which we implement using a map of all buildings in France. For each pixel, our approach compares actual building density after smoothing to counterfactual smoothed building density computed after randomly redistributing buildings. We define as urban any area with statistically significant excess building density. Within urban areas, extensions to our approach allow us to distinguish ‘core’ urban pixels and detect centres and subcentres. Finally, we develop novel one- and two-sided tests that provide a statistical basis to compare maps with different delineations, which we use to assess the robustness of our approach and to document large differences between our preferred deli...
February 2010Estimating Agglomeration Economies with History, Geology, and Worker Effects
with Pierre-Philippe Combes, Gilles Duranton, Sébastien Roux
in Agglomeration Economics, Edward L. Glaeser, editor
 
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