Price V. Fishback is the Frank and Clara Kramer Professor of" "Economics at the University of Arizona and a research associate of the National Bureau of Economic Research. He is the author of "Soft Coal, Hard Choices: The Economic Welfare of Bituminous Coal Miners, 1890-1930," Shawn Everett Kantor is professor of economics at the University of California, Merced. He is the author of "Politics and Property Rights: The Closing of the Open Range in the Postbellum South," also published by the University of Chicago Press.