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The role of randomized field trials in social science research: a perspective from evaluations of reforms of social welfare programs

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  • Robert Moffitt

Abstract

One of the areas of policy research where randomized field trials have been utilized mostintensively is welfare reform. Starting in the late 1960s with experimental tests of a negativeincome tax and continuing through current experimental tests of recent welfare reforms,randomized evaluations have played a strong and increasing role in informing policy. This paper reviews the record of these experiments and assesses the implications of that record for theuse of randomization. The review demonstrates that, while randomized field trials in the areaof welfare reform have been professionally conducted and well-run, and have yielded muchvaluable and credible information, their usefulness has been limited by a number of weaknesses,some of which are inherent in the method and some of which result from constraints imposed bythe political process. The conclusion is that randomized field trials have an important butlimited role to play in future welfare reform evaluations, and that it is essential that they besupplemented by nonexperimental research.

Suggested Citation

  • Robert Moffitt, 2002. "The role of randomized field trials in social science research: a perspective from evaluations of reforms of social welfare programs," CeMMAP working papers 23/02, Institute for Fiscal Studies.
    • Handle: RePEc:azt:cemmap:23/02
    DOI: 10.1920/wp.cem.2002.2302
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    2. Leventhal, Tama & Dupéré, Véronique, 2011. "Moving to Opportunity: Does long-term exposure to 'low-poverty' neighborhoods make a difference for adolescents?," Social Science & Medicine, Elsevier, vol. 73(5), pages 737-743, September.
    3. World Bank, 2007. "Poverty and Environment : Understanding Linkages at the Household Level," World Bank Publications - Books, The World Bank Group, number 6924, December.
    4. Kling, Jeffrey R., 2007. "Methodological Frontiers of Public Finance Field Experiments," National Tax Journal, National Tax Association;National Tax Journal, vol. 60(1), pages 109-127, March.
    5. Ravallion, Martin, 2008. "Evaluating Anti-Poverty Programs," Handbook of Development Economics, in: T. Paul Schultz & John A. Strauss (ed.), Handbook of Development Economics, edition 1, volume 4, chapter 59, pages 3787-3846, Elsevier.
    6. World Bank, 2007. "Poverty and Environment : Understanding Linkages at the Household Level," World Bank Publications - Reports 7744, The World Bank Group.
    7. Hugo Benitez-Silva & Moshe Buchinsky & John Rust, 2005. "Induced Entry Effects of a $1 for $2 Offset in SSDI Benefits," Department of Economics Working Papers 05-03, Stony Brook University, Department of Economics.
    8. Ted Joyce & Robert Kaestner & Sanders Korenman & Stanley Henshaw, 2004. "Family Cap Provisions and Changes in Births and Abortions," NBER Working Papers 10214, National Bureau of Economic Research, Inc.
    9. Nagy, Gyula & Micklewright, John, 2006. "Az álláskeresés ellenőrzése és a munkanélküliség időtartama. Egy társadalomtudományi kísérlet [Job-search monitoring and unemployment duration: evidence from a randomized control trial]," Közgazdasági Szemle (Economic Review - monthly of the Hungarian Academy of Sciences), Közgazdasági Szemle Alapítvány (Economic Review Foundation), vol. 0(7), pages 641-660.

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    More about this item

    JEL classification:

    • C9 - Mathematical and Quantitative Methods - - Design of Experiments
    • I3 - Health, Education, and Welfare - - Welfare, Well-Being, and Poverty

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