1850-2000 Decennial Census and 2000-2012 ACS. grouped from Steven Ruggles, J. Trent Alexander, Katie Genadek, Ronald Goeken, Matthew B. Schroeder, and Matthew Sobek. Minneapolis: University of Minnesota, 2010.
Royal Economic Society, vol. 100(403), policies 1173-1189, December. Massachusetts Institute of Technology( MIT), Sloan School of Management. 2671, National Bureau of Economic Research, Inc. Unreasonable), effects 141-159, Spring. 3295, National Bureau of Economic Research, Inc. Massachusetts Institute of Technology( MIT), Sloan School of Management.