Dual record systems for measurement of fertility change
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1971-04
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Honolulu, HI : East-West Population Institute, East-West Center
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Abstract
Dual record systems for measuring vital rates are emerging as statistical systems in their own right. Such systems are self-checking and hence lend themselves to experimentation, the study of measurement errors and the production of data of known quality. The major disadvantage is the higher cost, as compared with single systems, due -to the complexity of administration and the relatively high ratio of well-trained personnel required. The total error of estimates from dual systems may be considerably lower than in a single system with a much larger sample and hence more efficient. Countrywide dual systems in Pakistan, India, Thailand, Turkey and Liberia have experimented with several types of subsystems. On the basis of this experience and other experiments with measuring vital rates it is clear that much research is still required. Within dual systems many questions such as the following require answers: sample design in time and space, the best subsystems, matching procedures, boundary errors, the effect of quasi-independent subsystems on estimates, and methods of analysis. Features particularly essential to dual systems include: (1) tight and current field identification system in sample areas including maps, and a household numbering system, (2) a subsystem for continuous registration of vital events in sample areas, (3) a subsystem of panel surveys covering at least a subsample of the population in the registration sample, and (4) sound procedures for matching registration and survey events, In addition to providing better quality data dual systems provide a framework for evaluating different single systems for measuring fertility and mortality.
Description
This paper was prepared for the United Nations Technical Meeting on Methods of Analyzing Fertility Data for Developing Countries, Budapest, 1971, The research was partially supported by the East-West Population Institute and by a National Institutes of Health research grant number HD03441 to the University of North Carolina. This paper is circulated for discussion.
For more about the East-West Center, see http://www.eastwestcenter.org/
For more about the East-West Center, see http://www.eastwestcenter.org/
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Health surveys, Medical records, Fertility, Human, Dual record systems
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59 p.
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