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Attrition Bias in Panel Data: A Sheep in Wolf's Clothing? A Case Study Based on the MABEL Survey

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  • Cheng, T. C.;
  • Trivedi, P. K.;

Abstract

This paper investigates the nature and consequences of sample attrition in a unique longitudinal survey of medical doctors. We describe the patterns of non-response and examine if attrition affects the econometric analysis of medical labour market outcomes using the estimation of physician earnings equations as a case study. Descriptive evidence show that doctors who work longer hours, have lower years of experience, are overseas trained, and have changed their work location are more likely to drop out. Estimates from a number of different econometric models indicate that attrition does not have a significant impact on the estimation of physician earnings. We discuss how the top-up samples in MABEL survey can be used to address the problem of panel attrition.

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Paper provided by HEDG, c/o Department of Economics, University of York in its series Health, Econometrics and Data Group (HEDG) Working Papers with number 14/04.

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Date of creation: Jan 2014
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Handle: RePEc:yor:hectdg:14/04

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Postal: HEDG/HERC, Department of Economics and Related Studies, University of York, York, YO10 5DD, United Kingdom
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Web page: http://www.york.ac.uk/economics/postgrad/herc/hedg/
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Keywords: Attrition; MABEL longitudinal survey; Medical doctors; Earnings;

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  1. John Fitzgerald & Peter Gottschalk & Robert Moffitt, 1998. "An Analysis of Sample Attrition in Panel Data: The Michigan Panel Study of Income Dynamics," NBER Technical Working Papers 0220, National Bureau of Economic Research, Inc.
  2. Divine Ikenwilo & Anthony Scott, 2007. "The effects of pay and job satisfaction on the labour supply of hospital consultants," Health Economics, John Wiley & Sons, Ltd., vol. 16(12), pages 1303-1318.
  3. Keisuke Hirano & Guido W. Imbens & Geert Ridder & Donald B. Rubin, 2001. "Combining Panel Data Sets with Attrition and Refreshment Samples," Econometrica, Econometric Society, vol. 69(6), pages 1645-1659, November.
  4. Murray D. Smith, 2003. "Modelling sample selection using Archimedean copulas," Econometrics Journal, Royal Economic Society, vol. 6(1), pages 99-123, 06.
  5. McNabb, Robert & Wass, Victoria, 2006. "Male-female earnings differentials among lawyers in Britain: a legacy of the law or a current practice?," Labour Economics, Elsevier, vol. 13(2), pages 219-235, April.
  6. Gary Solon & Steven J. Haider & Jeffrey Wooldridge, 2013. "What Are We Weighting For?," NBER Working Papers 18859, National Bureau of Economic Research, Inc.
  7. Rizzo, John A. & Blumenthal, David, 1994. "Physician labor supply: Do income effects matter?," Journal of Health Economics, Elsevier, vol. 13(4), pages 433-453.
  8. Hausman, Jerry A & Wise, David A, 1979. "Attrition Bias in Experimental and Panel Data: The Gary Income Maintenance Experiment," Econometrica, Econometric Society, vol. 47(2), pages 455-73, March.
  9. Andrew M. Jones, 2007. "Panel data methods and applications to health economics," Health, Econometrics and Data Group (HEDG) Working Papers 07/18, HEDG, c/o Department of Economics, University of York.
  10. Trivedi, Pravin K. & Zimmer, David M., 2007. "Copula Modeling: An Introduction for Practitioners," Foundations and Trends(R) in Econometrics, now publishers, vol. 1(1), pages 1-111, April.
  11. Alicia C. Sasser, 2005. "Gender Differences in Physician Pay: Tradeoffs Between Career and Family," Journal of Human Resources, University of Wisconsin Press, vol. 40(2).
  12. Jeffrey M. Wooldridge, 2001. "Econometric Analysis of Cross Section and Panel Data," MIT Press Books, The MIT Press, edition 1, volume 1, number 0262232197, December.
  13. Ridder, Geert, 1992. "An empirical evaluation of some models for non-random attrition in panel data," Structural Change and Economic Dynamics, Elsevier, vol. 3(2), pages 337-355, December.
  14. Nijman, Theo & Verbeek, Marno, 1992. "Nonresponse in Panel Data: The Impact on Estimates of a Life Cycle Consumption Function," Journal of Applied Econometrics, John Wiley & Sons, Ltd., vol. 7(3), pages 243-57, July-Sept.
  15. Gravelle, Hugh & Hole, Arne Risa & Santos, Rita, 2011. "Measuring and testing for gender discrimination in physician pay: English family doctors," Journal of Health Economics, Elsevier, vol. 30(4), pages 660-674, July.
  16. Takuya Hasebe, 2013. "Copula-based maximum-likelihood estimation of sample-selection models," Stata Journal, StataCorp LP, vol. 13(3), pages 547-573, September.
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