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TASK. Assume National Values How to Generate Regional and Global Estimates Missing Data Weighting Level and Trend Why?. Missing Data. Patterns of Missingness. 120. Botswana. Bur. Faso. 100. Burundi. 80. DR Congo. Lesotho. 60. Malawi. 40. Mozam. 20. Namibia. Rwanda. 0. S A. - PowerPoint PPT Presentation
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TASK
• Assume National Values
• How to Generate Regional and Global Estimates– Missing Data– Weighting– Level and Trend
• Why?
Missing Data
• Patterns of Missingness
Primary Enrolment Rates: African Countries
0
20
40
60
80
100
120
1990 1991 1992 1993 1994 1995 1996 1997 1998
Years
BotswanaBur. FasoBurundiDR CongoLesothoMalawiMozamNamibiaRwandaS ASwazilandZambia
Imputation
• None
• Explicit or Implicit
• Time Series – whole or partial-within country
• Pooling information from ‘neighbours’
• Auxiliary Information
• Diagnostics?
Aggregation
Mainly straightforward• Weighted aggregation
– Choice of appropriate weights
• Diagnostics– Rules of suppression vary
• % region, % countries
– The China Question– Dominance of large coutries
Estimating Change / Trends
• What is purpose– Summarise progress of region– Summarise progress of countries within region– Role of weights
• Changing mix of countries• No new Data• Diagnostics• Communication
Documentation
• What, where, how?
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