Louis P. Cain is Professor of Economics Emeritus at Loyola University Chicago and Adjunct Professor of Economics at Northwestern University. He co-authored The Children of Eve with Donald Paterson and American Economic History with the late Jonathan Hughes. Price V. Fishback is Thomas R. Brown Professor of Economics at the University of Arizona, a research associate at the National Bureau of Economic Research, and the Executive Director of the Economic History Association. He is the co-author of Government and the American Economy: a New History and has won several awards for research and teaching from the Economic History Association and the Cliometrics Society. Paul W. Rhode is Professor and Chair of Economics at the University of Michigan, a research associate at the National Bureau of Economic Research, and former editor of The Journal of Economic History. He is co-author (with Alan Olmstead) of Creating Abundance: Biological Innovation in American Agricultural Development and Arresting Contagion: Science, Policy and Conflict over Animal Disease Control.