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2 Paul E. Peterson and Mark C. Rom, Welfare Magnets: A New Case for a National Standard (Washington, D.C., 1990).
3 Wallace E. Oates, "An Essay on Fiscal Federalism," Journal of Economic Literature 37 (1999): 1120-49.
4 Michael Wiseman, "Welfare Reform in the United States: A Background Paper," Housing Policy Debate 7, no. 3 (1996): 1-54.