The Cox and Alm book is based on studies from the Dallas FED, and they get their data to a large degree the University of Michigan Panel data which has been tracking income mobility.
So I think the skeptics will have a hard time dismissing the book as based on weak data, etc. Prof. Peter J. Boettke, Deputy Director James M. Buchanan Center for Political Economy Department of Economics, MSN 3G4 George Mason University Fairfax, VA 22030 Phone: 703-993-1149 FAX: 703-993-1133 Email: [EMAIL PROTECTED] HomePage: http://www.gmu.edu/departments/economics/pboettke Editor, THE REVIEW OF AUSTRIAN ECONOMICS