NBER Working Paper No. 18839
---- Acknowledgements ----
We thank Tim Besley, Martin Cripps, Jeffrey Frieden, Oded Galor, Terri Kneeland, Mark Koyama, Alessandro Riboni, Enrico Spolaore and participants in seminars at Brown, Cambridge, U of Chicago, UCL, Warwick, a CEPR meeting, an ISNIE meeting, a conference in Berkeley and the NBER Summer Institute for useful comments. Giulia Giupponi and Andrea Passalacqua provided excellent research assistance. The views expressed herein are those of the authors and do not necessarily reflect the views of the National Bureau of Economic Research.