The Economics of Density: Evidence From the Berlin Wall

Authors

• Gabriel M. Ahlfeldt,

  • E-mail address: g.ahlfeldt@lse.ac.uk

  1. Dept. of Geography and Environment, London School of Economics, London, U.K.
  2. CEPR

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• Stephen J. Redding,

  • E-mail address: reddings@princeton.edu

  1. CEPR
  2. WWS, Dept. of Economics, Princeton University, Princeton, NJ, U.S.A.
  3. NBER

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• Daniel M. Sturm,

  • E-mail address: d.m.sturm@lse.ac.uk

  1. CEPR
  2. Dept. of Economics, London School of Economics, London, U.K.

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• Nikolaus Wolf

  • E-mail address: nikolaus.wolf@wiwi.hu-berlin.de

  1. CEPR
  2. Dept. of Economics, Humboldt University, Berlin, Germany

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  • We are grateful to the European Research Council (Grant 263733), German Science Foundation (Grants STU 477/1-1 and WO 1429/1-1), the Centre for Economic Performance, and Princeton University for financial support. The accompanying online Supplemental Material contains detailed derivations and supplementary material for the paper. A separate Technical Data Appendix, located together with the replication data and code, collects together additional empirical results and robustness tests. Thilo Albers, Horst Bräunlich, Daniela Glocker, Kristoffer Möller, David Nagy, Utz Pape, Ferdinand Rauch, Claudia Steinwender, Sevrin Waights, and Nicolai Wendland provided excellent research assistance. We would like to thank the editor, four anonymous referees, conference and seminar participants at AEA, Arizona, Barcelona, Berlin, Berkeley, Brussels, CEPR, Chicago, Clemson, Columbia, EEA, Harvard, Mannheim, Marseille, MIT, Munich, NARSC, Luzern, Nottingham, NYU, Oxford, Paris, Princeton, Rutgers, Shanghai, Stanford, Tübingen, UCLA, Virginia, and the World Bank for helpful comments. We are also grateful to Dave Donaldson, Cecilia Fieler, Gene Grossman, Bo Honore, Ulrich Müller, Sam Kortum, Eduardo Morales, and Esteban Rossi-Hansberg for their comments and suggestions. The usual disclaimer applies.