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Tracking, Attrition and Data Quality in the Kenyan Life Panel Survey Round 1 (KLPS-1)

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Author Info

  • Baird, Sarah
  • Hamory, Joan
  • Miguel, Edward

Abstract

Understanding the possible pitfalls of survey data is critical for empirical research. Among other things, poor data quality can lead to biased regression estimates, potentially resulting in incorrect interpretations that mislead researchers and policymakers alike. Common data problems include difficulties in tracking respondents and high survey attrition, enumerator error and bias, and respondent reporting error. This paper describes and analyzes these issues in Round 1 of the Kenyan Life Panel Survey (KLPS-1), collected in 2003-2005. The KLPS-1 is an innovative longitudinal dataset documenting a wide range of outcomes for Kenyan youths who had originally attended schools participating in a deworming treatment program starting in 1998. The careful design of this survey allows for examination of an array of data quality issues. First, we explore the existence and implications of sample attrition bias. Basic residential, educational, and mortality information was obtained for 88% of target respondents, and personal contact was made with 84%, an exceptionally high follow-up rate for a young adult population in a less developed country. Moreover, rates of sample attrition are nearly identical for respondents who were randomly assigned deworming treatment and for those who were not, a key factor in the validity of subsequent statistical analysis. One vital component of this success is the tracking of respondents both nationally and across international borders (in our case, into Uganda), thus we discuss in detail the costs and benefits of tracking movers. Finally, we study KLPS-1 data quality more broadly by examining enumerator error and bias, as well as survey response consistency. We conclude that the extent of enumerator error is low, with an average of less than one recording error per survey. Errors decrease over time as enumerator experience with the survey instrument increases, but increase over the course of multiple interviews within a single day, presumably due to fatigue. We do find some evidence that the enumerator-respondent match in terms of gender, ethnicity, and religion correlates with responses regarding trust of others and religious activities, suggesting some field officer bias on sensitive questions. Reporting reliability is analyzed using respondent re-surveys. These checks show high levels of consistency across survey/re-survey rounds for the respondent’s own characteristics and personal history,with lower reliability rates on questions asked about others’ characteristics. The steps taken in the design of KLPS-1 to avoid common errors in survey data collection greatly improved the quality of this panel dataset, and provide some valuable lessons for future field data collection projects.

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Bibliographic Info

Paper provided by Center for International and Development Economics Research, Institute for Business and Economic Research, UC Berkeley in its series Center for International and Development Economics Research, Working Paper Series with number qt3cw7p1hx.

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Date of creation: 01 Aug 2008
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Handle: RePEc:cdl:ciders:qt3cw7p1hx

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Related research

Keywords: survey data; enumerator error; longitudinal dataset; Kenya; deworming;

References

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  1. John Fitzgerald & Peter Gottschalk & Robert Moffitt, 1997. "An Analysis of Sample Attrition in Panel Data: The Michigan Panel Study of Income Dynamics," Boston College Working Papers in Economics 394, Boston College Department of Economics.
  2. Mathiowetz, Nancy A & Duncan, Greg J, 1988. "Out of Work, Out of Mind: Response Errors in Retrospective Reports of Unemployment," Journal of Business & Economic Statistics, American Statistical Association, vol. 6(2), pages 221-29, April.
  3. Duncan Thomas & Elizabeth Frankenberg & James P. Smith, 2004. "Lost but Not Forgotten: Attrition and Follow-up in the Indonesia Family Life Survey," Labor and Demography 0408007, EconWPA.
  4. Sean Becketti & William Gould & Lee Lillard & Finis Welch, 1985. "The Panel Study of Income Dynamics After Fourteen Years: An Evaluation," UCLA Economics Working Papers 361, UCLA Department of Economics.
  5. Jeffrey R. Kling & Jeffrey B. Liebman, 2005. "Experimental Analysis Of Neighborhood Effects On Youth," Working Papers 249, Princeton University, Woodrow Wilson School of Public and International Affairs, Center for Health and Wellbeing..
  6. Falaris, Evangelos M., 2003. "The effect of survey attrition in longitudinal surveys: evidence from Peru, Cote d'Ivoire and Vietnam," Journal of Development Economics, Elsevier, vol. 70(1), pages 133-157, February.
  7. Edward Miguel & Michael Kremer, 2004. "Worms: Identifying Impacts on Education and Health in the Presence of Treatment Externalities," Econometrica, Econometric Society, vol. 72(1), pages 159-217, 01.
  8. James P. Smith & Duncan Thomas, 2003. "Remembrances of things past: test-retest reliability of retrospective migration histories," Journal of the Royal Statistical Society Series A, Royal Statistical Society, vol. 166(1), pages 23-49.
  9. Jeffrey R. Kling & B. Jeffrey Liebman, 2004. "Experimental Analysis of Neighborhood Effects on Youth," Working Papers 862, Princeton University, Department of Economics, Industrial Relations Section..
  10. FFF1Simona NNN1Bignami-Van Assche & FFF2Georges NNN2Reniers & FFF2Alexander A. NNN2Weinreb, 2003. "An Assessment of the KDICP and MDICP Data Quality," Demographic Research Special Collections, Max Planck Institute for Demographic Research, Rostock, Germany, vol. 1(2), pages 31-76, September.
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Citations

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Cited by:
  1. Akresh, Richard & Edmonds, Eric V., 2010. "The Analytical Returns to Measuring a Detailed Household Roster," IZA Discussion Papers 4759, Institute for the Study of Labor (IZA).
  2. Edward Miguel & Joan Hamory, 2009. "Individual Ability and Selection into Migration in Kenya," Human Development Research Papers (2009 to present) HDRP-2009-45, Human Development Report Office (HDRO), United Nations Development Programme (UNDP), revised Sep 2009.
  3. Philip Verwimp & Tom Bundervoet, 2008. "Consumption Growth, Household Splits and Civil War," Research Working Papers 9, MICROCON - A Micro Level Analysis of Violent Conflict.
  4. Kasirye, Ibrahim & Ssewanyana, Sarah N., 2010. "Impacts and determinants of panel survey attrition: The case of Northern Uganda survey 2004-2008," Research Series 127536, Economic Policy Research Centre (EPRC).
  5. Croke, Kevin & Dabalen, Andrew & Demombynes, Gabriel & Giugale, Marcelo & Hoogeveen, Johannes, 2012. "Collecting high frequency panel data in Africa using mobile phone interviews," Policy Research Working Paper Series 6097, The World Bank.
  6. Nic Baigrie & Katherine Eyal, 2013. "An evaluation of the determinants and implications of panel attrition in the National Income Dynamics Survey (2008 – 2010)," SALDRU Working Papers 103, Southern Africa Labour and Development Research Unit, University of Cape Town.
  7. Arunachalam, Raj & Shah, Manisha, 2010. "The Prostitute's Allure: Examining Returns to Beauty, Productivity and Discrimination," IZA Discussion Papers 5064, Institute for the Study of Labor (IZA).
  8. Aslihan Arslan & J. Edward Taylor, 2011. "Whole-household Migration, Inequality and Poverty in Rural Mexiko," Kiel Working Papers 1742, Kiel Institute for the World Economy.

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