Chandrasekaran-Deming Technique
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Chandrasekaran-Deming Technique: BACKGROUND
Several demographic techniques have been developed to assess and adjust information on deaths that come from civil registration, demographic surveillance, censuses or population based surveys that ask about deaths of household members during a specified time before the survey period.
Some methods compare data from independent sources (direct capture-recapture approaches) while others are analytic indirect methods based on assumptions on the population age distribution.
Preston (1984) reviews the former, which are based on the Chandrasekaran-Deming technique. Chandrasekaran-Deming is an early demographic method designed to estimate population birth and death rates from different demographic data collection systems. Originally developed in 1949, it estimates the total number of events or cases (e.g. deaths) from the numbers of cases reported by the two reporting systems independently. These can include the death registration system, censuses, household surveys or active reporting by key informants. For example, deaths reported in an independent survey of mortality are compared to deaths reported in the death registration system for the same population. Unmatched and unrecorded deaths can thus be identified and estimated.
Limitations:
- lack of independence
- incompatible areas of reference
- incompatible reference periods
- difficulties in identifying matches in the deaths reported
- can be an expensive means to assess data completeness since a sufficiently large population sample is required
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Chandrasekaran-Deming Technique: REFERENCES
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Chandrasekaran, C; Deming WE (1949) On a method of estimating birth and death rates and the extent of registration. Journal of the American Statistical Association 44(245): 101-15.
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Greenfield, CC (1983) On estimators for dual record systems. Journal of the Royal Statistical Society. Series A (General), 146(3): 273-80. |
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Seltzer, W; Adlakha, A (l974), On the effect of errors in the application of the Chandrasekaran-Deming Technique. Laboratory for Population Statistics Reprint Series No.14, University of North Carolina, Chapel Hill. |
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