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Questionnaire Design and Response Propensities for Employee Income Micro Data

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  • Reza C. Daniels

    ()
    (SALDRU, School of Economics, University of Cape Town)

Abstract

The design of the income question in household surveys usually includes response options for actual income, bracketed values, "Don't Know" and "Refuse" responses. This paper conducts an analysis of these response types using sequential response models specified analogously to those in the survey participation literature. We analyse the income question in Statistics South Africa's October Household Surveys (1997-1999) and Labour Force Surveys (2000-2003). The choice of survey years coincides with a period of development of the income question during which additional response options were steadily introduced to the questionnaire. An analysis of this sort sheds light on the underlying response process, which is useful for survey planning purposes and to researchers concerned with diagnosing the item missing and partial response mechanisms for variables of interest. It was found that the probability of a bracketed response increases as income increases, suggesting that this response option plays a significant role in getting higher income earners to answer the question. However, the relationship between response type and the correlates of income are no longer consistently statistically significant when the item nonresponse subset is decomposed into "Don't Know" and "Refuse". These findings suggest that response propensity models can help reduce specification error in single or multiple imputation algorithms. This is a joint SALDRU and DataFirst working paper

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File URL: http://opensaldru.uct.ac.za/bitstream/handle/11090/180/2012_89.pdf?sequence=1
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Bibliographic Info

Paper provided by Southern Africa Labour and Development Research Unit, University of Cape Town in its series SALDRU Working Papers with number 89.

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Date of creation: 2012
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Handle: RePEc:ldr:wpaper:89

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Keywords: Questionnaire Design; Response Propensity Models; Employment Income;

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  1. Rosalia Vazquez-Alvarez, 2003. "Anchoring Bias and Covariate Nonresponse," University of St. Gallen Department of Economics working paper series 2003 2003-19, Department of Economics, University of St. Gallen.
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Cited by:
  1. Reza C. Daniels, 2012. "Univariate Multiple Imputation for Coarse Employee Income Data," SALDRU Working Papers 88, Southern Africa Labour and Development Research Unit, University of Cape Town.
  2. Wittenberg, Martin & Pirouz, Farah, 2013. "The measurement of earnings in the post-Apartheid period: An overview," SALDRU Working Papers 108, Southern Africa Labour and Development Research Unit, University of Cape Town.

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