The Myth of the Frontier
---- Acknowledgements ----
This paper was written for the conference "Understanding Long-Run Economic Growth: A Conference Honoring the Contribution of Kenneth Sokoloff". Our biggest debt is to Ken for all his encouragement, friendship and inspiration over the years. We miss him. We thank Ron Rogowski for his discussion and suggestions. We also thank Giovanni Zambotti at the Center for Geographic Analysis at Harvard for his enormous help with the maps. We thank the Canadian Institute for Advanced Research for financial support. The views expressed herein are those of the author(s) and do not necessarily reflect the views of the National Bureau of Economic Research.