Research note reveals reporting inconsistencies in birth date and parity data among U.S. respondents, suggesting socioeconomic influences.
In a longitudinal survey, most people consistently report parity and birth date information. One in 10 respondents, and one in five parents, report parity inconsistently across waves. Among those who reported children at an earlier wave, 11% report different dates of first birth. Inconsistency in parity and first birth dates was higher among males and less advantaged people.
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Guzzo et al. (2026) studied this question.
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