NBER Working Paper No. 14369
---- Acknowledgements ----
We thank Miklos Koren, Dan Tatar, and David Sacks for many helpful discussions. We also thank Marco Gonzales-Navarro, Gilles Duranton, and seminar participants at Yonsei University for their comments. Finally, we thank Brian Minton and Kevin Bryan for outstanding research assistance. The views expressed herein are those of the author(s) and do not necessarily reflect the views of the National Bureau of Economic Research.