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The quality of age data from some recent Arab population censuses

The quality of age data from some recent Arab population censuses. First Conference of Al Khawarezmi in the Arab States Ismail Lubbad Doha, 6-8 December 2010. Introduction Census in ESCWA countries- An overview Objectives, data source and methodology Results Age-sex reporting

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The quality of age data from some recent Arab population censuses

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  1. The quality of age data from some recent Arab population censuses First Conference of Al Khawarezmi in the Arab States Ismail LubbadDoha, 6-8 December 2010

  2. Introduction Census in ESCWA countries- An overview Objectives, data source and methodology Results Age-sex reporting Sex ratio with age Age heaping - digit preference Conclusion Contents

  3. Importance of population census data Stock data for population estimates/projections Data for sampling frames Only source of data on small areas (localities) Long history of census taking in the region Quality of census data – rarely evaluated Importance of age and sex data Introduction

  4. Census taking in ESCWA countries Table 1: Census taking in ESCWA countries

  5. Objectives and Methodology • Objectives: To examine the accuracy of age-sex reporting and the patterns of digit preference in censuses of population in (ESCWA) Arab countries. • Source of data: Tables on age-sex reporting from the two most recent censuses - NSOs • Methods: Descriptive analysis – common indices: • UN age-sex accuracy index, • Whipple-type indices • and descriptive charts Software: Population Analysis Spreadsheets (PAS)

  6. Results Table 2: Age-sex non-reporting in population census in ESCWA countries

  7. Accuracy of age-sex reporting • United Nations Age-Sex Accuracy Index measures sex-specific omission of persons in addition to age misreporting • Based on 5 year age groups Criteria of the U.N. INDEX Under 20 → Accurate • to 40 → Inaccurate Over 40 → Highly Inaccurate

  8. UN age-sex Accuracy index Table 3: Results of UN Age-Sex Accuracy Index in ESCWA countries (nationals only)

  9. UN age-sex accuracy index (cont…) UN age-sex Accuracy index

  10. Patterns of sex ratio with age

  11. Patterns of sex ratio with age

  12. Age heaping and digit preference • Data required: Population by sex and single year age • Index of measurement: Whipple's index

  13. Age heaping and digit preference • Table 4: Totals of Whipple and Myer's Indexes in ESCWA countries

  14. Population Pyramid in Yemen 2004

  15. Population Pyramid in Syria 2004

  16. Population Pyramid in Qatar 2004

  17. Conclusion – Looking forward • Preliminary results - PC 2010 will enrich the study and give a full picture; • Improvement in age reporting in all the countries • No problems in age heaping except for Yemen • Age sex structure is considered inaccurate in a number of the ESCWA countries

  18. Thank You lubbad@un.org

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