Agglomeration: A Dynamic Approach
---- Acknowledgements ----
We thank David Albouy, Pierre-Philippe Combes, Dora Costa, Don Davis, Jonathan Dingel, Gilles Duranton, Glenn Ellison, Ben Faber, Pablo Fajgelbaum, Edward Glaeser, Laurent Gobillon, Richard Hornbeck, Matt Kahn, Petra Moser, Alex Whalley and seminar participants at Columbia, UCLA, Harvard, UC Merced, UC San Diego, the NBER Innovation group, the NBER Urban Economics group, the CURE conference at Brown University, and the Urban Economics Association Annual Conference, for helpful comments and suggestions. Reed Douglas provided excellent research assistance. Funding for this project was provided by a grant from UCLA's Ziman Center for Real Estate. The views expressed herein are those of the authors and do not necessarily reflect the views of the National Bureau of Economic Research.