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  • Title: Individual-level fertility measures derived from the own children method: an evaluation of Southeast Asian census data.
    Author: Guest P.
    Journal: Majalah Demografi Indones; 1991 Jun; 18(35):43-58. PubMed ID: 12317016.
    Abstract:
    The author presents a discussion and analysis of the number of children ever born estimated by the own children method for women 15-49 in the 1970 and 1980 censuses for Indonesia, Malaysia, the Philippines, and Thailand. The underlying assumption is that mothers and children can be matched in households, and age specific individual fertility can be determined. At the aggregate level, the adjustments made are acceptable, but at the individual level, researchers employing multivariate methods of analysis must be aware of the possible sources of error, particularly age misstatement. The matching rules used were those of Cho et al: the child must be 0-4 years, the potential mother 15-49 years, and the relationship to the head of household had to be a logical link. Matching was refined for Indonesia, the Philippines, and Thailand where the child's record had the child's mother's record number reported on it. The results of the matching assumed an approximate equal distribution of increase with age for each age group 1-4. Only in 1 year for Indonesia in 1970 is there a difference, where the expected match was 20% and actual match 13%; underenumeration has been reported by Cho et al. Mismatches are likely to occur in areas where there are separate residences for mothers and children, and where child separation is made due to the death of a mother. A comparison of the % of children matched to their mothers indicates that 95% matching except for Malaysia in 1980 (90%), Indonesia in 1971 (92%), and Thailand in 1980 (92%). Suggested explanations are given for the variation. The difficulties in matching, mortality, and underenumeration affect variations in individual fertility. It is essential to carefully evaluate the extent of error. To evaluate the accuracy of the matching procedure, information on the timing of births is necessary; the 1980 Philippines and Indonesian censuses have this data based on the preceding 12 months or less. Matching was made with mothers reporting a live birth with those with a child in the household 1. In the Philippines 98% of the expected survivors were matched, while only 89% were in Indonesia. By educational level, mismatching for Indonesia was 25.9%, but mismatches occurred primarily in the last educated group. The sources of potential error are identified, and caution is urged in the uncritical acceptance of the own children method.
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