My comments on this are now available at http://hanson.gmu.edu/nanoecon.pdf and that is where revisions will appear. Robin Hanson rhanson at gmu.edu http://hanson.gmu.edu Assistant Professor of Economics, George Mason University MSN 1D3, Carow Hall, Fairfax VA 22030-4444 703-993-2326 FAX: 703-993-2323