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The impacts of disclosure control on Census analysis

This study explores the effects of disclosure control measures on census data analysis, identifying challenges, impacts, and possible solutions. The research discusses pre-2001 and 2001 SDC measures, impacts on population rarity, and solutions to summarize impact by various variables. It also covers responses to SDC, including univariate counts and minimizing spatial units. The findings aim to enhance understanding and address issues related to census data under attack.

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The impacts of disclosure control on Census analysis

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  1. The impacts of disclosure control onCensus analysis Paul Williamson University of Liverpool, UK [P.Williamson@liv.ac.uk]

  2. v 1. The need for SDC

  3. 2. Census data under attack? • Pre-2001 SDC measures • 2001 SDC measures

  4. 0 1 2 3 … 2. Census data under attack?

  5. 3. Impacts of disclosure control

  6. 3. Impacts of SDC • ONS • Simpson • Others • Problem… • Population rarity

  7. 3. Impacts • Solution: • Summarise impact of SDC by • table/count type

  8. 3. Impacts • Solution: • Summarise impact of SDC by • table/count type • population rarity • level of geographical aggregation • method of SDC • type of analysis

  9. 95% Confidence Intervals

  10. 4. Responses to SDC • (a) Counts • Univariate counts  marginals • Largest possible building blocks • Minimise spatial units used

  11. 0 1 2 3 … 5. Conclusion

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