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This report summarizes the work of the Census Undercount Adjustment for Small Area group as it pertains to Demographic Analysis (DA) Synthetic estimation. The group presented and described its activity at several conferences and documented its work in several memoranda and in papers. The papers include comparisons of the performance of the Demographic Analysis synthetic estimator with other estimators. In the present report however, we restrict discussion to the DA synthetic estimator and comparisons to the Census using various "measures of improvement" and "truths". The "measures of improvement" include mean absolute relative error as well as other indicators of performance such as errors in apportionment when compared to the "truth". The sources used to represent "truth" were the results of the 1980 Post Enumeration Program (PEP) as well as constructed populations based on the 1980 Census. It was necessary to hypothesize what was meant by "truth" in order to obtain a standard for comparison.
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