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Improving Estimates of Inequality and Poverty From Urban China’s Household Income and Expenditure Survey

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  • John Gibson

    ()
    (University of Waikato)

  • Jikun Huang
  • Scott Rozelle

Abstract

In urban China the Household Income and Expenditure Survey requires respondents to keep a daily expenditure diary for a full 12-month period. This onerous reporting task makes it difficult to recruit households into the survey, compromising the representative nature of the sample. In this article we use data on the monthly expenditures of households from two urban areas of China to see if data collection short-cuts, such as extrapolating to annual totals from expenditure reports in only some months of the year, would harm the accuracy of annual expenditure, inequality and poverty estimates. Our results show that replacing 12-month diaries with simple extrapolations from either one, two, four or six months would cause a sharp increase in estimates of annual inequality and poverty. This finding also undermines international comparisons of inequality statistics because no country other than China uses such comprehensive 12-month expenditure records. But a corrected form of extrapolation, based on correlations between the same household’s expenditures in different months of the year, gives much smaller errors in estimates of inequality and poverty.

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File URL: ftp://mngt.waikato.ac.nz/RePEc/wai/econwp/0201.pdf
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Bibliographic Info

Paper provided by University of Waikato, Department of Economics in its series Working Papers in Economics with number 02/01.

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Length: 26 pages
Date of creation: 30 Jan 2002
Date of revision:
Handle: RePEc:wai:econwp:02/01

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Keywords: income distribution; survey methods;

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  1. Grootaert, Christiaan, 1994. "Poverty and basic needs fulfilment in Africa during structural change: Evidence from Cote d'Ivoire," World Development, Elsevier, vol. 22(10), pages 1521-1534, October.
  2. Foster, James & Greer, Joel & Thorbecke, Erik, 1984. "A Class of Decomposable Poverty Measures," Econometrica, Econometric Society, vol. 52(3), pages 761-66, May.
  3. Ravallion, Martin & Chen, Shaohua, 1999. " When Economic Reform Is Faster Than Statistical Reform: Measuring and Explaining Income Inequality in Rural China," Oxford Bulletin of Economics and Statistics, Department of Economics, University of Oxford, vol. 61(1), pages 33-56, February.
  4. Ravallion, Martin, 1988. "Expected Poverty under Risk-Induced Welfare Variability," Economic Journal, Royal Economic Society, vol. 98(393), pages 1171-82, December.
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