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Author: Long, Daniel A.

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1.	Wu, Lawrence L. Martin, Steven P. Long, Daniel A.
1.	Comparing Data Quality of Fertility and First Sexual Intercourse Histories Presented: Ann Arbor, MI, Data Quality in Longitudinal Surveys Conference, October 1998 Cohort(s): NLSY79 Publisher: Center for Demography and Ecology Keyword(s): Age at First Intercourse; Current Population Survey (CPS) / CPS-Fertility Supplement; Data Quality/Consistency; Demography; Fertility; Longitudinal Surveys; National Survey of Family Growth (NSFG); Research Methodology Permission to reprint the abstract has not been received from the publisher. This paper evaluates the data quality of two demographic outcomes in light of hypotheses on respondent recall from the literature on survey methodology. An emerging consensus in this literature is that respondents engage in a process of recall; hence, retrieval of less well-remembered items (for example, the specific dates for the timing of distant events) may improve if survey designers precede such questions by others that are likely to be better remembered, if respondents are specifically instructed that such items are important, or if questions in parallel domains provide implicit or explicit memory prompts that aid the process of recall. An alternative but not mutually exclusive hypothesis is that recall of the timing of an event declines with duration unless the dating of an event is frequently "rehearsed." We investigate these hypotheses by comparing the quality of demographic data supplied by female respondents on selected event history outcomes across multiple nationally representative surveys. A first outcome concerns the interval between a first and second birth. We compare birth interval data using birth registration data using micro data from the Vital Statistics on Natality (VSN), the June Current Population Survey (CPS), the 1979 - 94 waves of the National Longitudinal Survey of Youth (NLSY). and the 1988 National Survey of Family Growth (NSFG). Despite marked differences in survey design, we find relatively few differences in the quality of birth interval data across the four surveys. A second outcome is age at first sexual intercourse. Using data from the NLSY and NSFG, we analyze a form of partially missing data (respondent inability to recall the calendar month of intercourse) on age at first intercourse that occurs in both surveys. We find that inability to recall calendar month varies significantly with duration of recall, race and ethnicity, ability, early initiation of sexual activity, and some interview characteristics. Observed differences by race and ethnicity narrow substantially when controlling for additional background factors available in the NLSY. In addition, we find important nonlinearities in respondent recall with duration, with results from both nonparametric and confirmatory analyses suggesting strikingly similar patterns of nonlinearities for both NLSY and NSFG respondents.
	Bibliography Citation Wu, Lawrence L., Steven P. Martin and Daniel A. Long. "Comparing Data Quality of Fertility and First Sexual Intercourse Histories." Presented: Ann Arbor, MI, Data Quality in Longitudinal Surveys Conference, October 1998.

2.	Wu, Lawrence L. Martin, Steven P. Long, Daniel A.
2.	Comparing Data Quality of Fertility and First Sexual Intercourse Histories Journal of Human Resources 36,3 (Summer 2001): 520-555. Also: http://www.jstor.org/stable/3069629 Cohort(s): NLSY79 Publisher: University of Wisconsin Press Keyword(s): Age at First Intercourse; Current Population Survey (CPS) / CPS-Fertility Supplement; Data Quality/Consistency; Event History; Fertility; First Birth; National Survey of Family Growth (NSFG); Sexual Activity; Sexual Experiences/Virginity This paper evaluates the data quality of two demographic variables in light of hypotheses on respondent recall from the literature on survey methodology. An emerging consensus in this literature is that recall of the timing of an event declines with recall duration unless the dating of an event is frequently "rehearsed." We provide empirical evidence consistent with this hypothesis by assessing the quality of demographic data on two event history variables as supplied by female respondents. A first outcome concerns the interval between a first and second birth. We assess examine birth intervals using birth registration data from the Vital Statistics on Natality (VSN) and individual-level survey data from the 1990 June Current Population Survey (CPS), the 1979-93 waves of the National Longitudinal Survey of Youth (NLSY), and the 1988 National Survey of Family Growth (NSFG). Overall, we find relatively little variation in the quality of birth interval data across these four surveys, with one exception--CPS data in which responses have been allocated. A second demographic variable is age at first sexual intercourse. We engage in several analyses of this variable. First, we use NLSY data to analyze discrepancies between successive reports on age (to the nearest year) at first intercourse. Second, we analyze a form of partially missing data (respondent inability to recall the calendar month of intercourse) that occurs in both the NLSY and NSFG. Third, we identify NLSY respondents who, in successive interviews, give contradictory reports about whether or not sexual activity had been initiated. Our findings suggest that data quality varies significantly with duration of recall and with measures of respondent ability related to arithmetic facility and memory. Observed differences by race and ethnicity narrow substantially when controlling for these and other background factors. We find evidence for a nonlinear association between duration of recall and data quality, with similar patterns occurring in both the NLSY and NSFG. Finally, our NLSY results are suggestive of a pattern in which recent initiation of sexual activity may be concealed by respondents.
	Bibliography Citation Wu, Lawrence L., Steven P. Martin and Daniel A. Long. "Comparing Data Quality of Fertility and First Sexual Intercourse Histories." Journal of Human Resources 36,3 (Summer 2001): 520-555.

3.	Wu, Lawrence L. Martin, Steven P. Long, Daniel A.
3.	Comparing Data Quality of Fertility and First Sexual Intercourse Histories CDE Working Paper No. 99-08 (October, 1998), Center for Demography and Ecology, University of Wisconsin - Madison, revised, April 1999. Also: http://www.ssc.wisc.edu/cde/cdewp/99-08.pdf Cohort(s): NLSY79 Publisher: Center for Demography and Ecology Keyword(s): Age at First Intercourse; Current Population Survey (CPS) / CPS-Fertility Supplement; Data Quality/Consistency; Demography; Fertility; Longitudinal Surveys; National Survey of Family Growth (NSFG); Research Methodology Permission to reprint the abstract has not been received from the publisher. This paper evaluates the data quality of two demographic outcomes in light of hypotheses on respondent recall from the literature on survey methodology. An emerging consensus in this literature is that respondents engage in a process of recall; hence, retrieval of less well-remembered items (for example, the specific dates for the timing of distant events) may improve if survey designers precede such questions by others that are likely to be better remembered, if respondents are specifically instructed that such items are important, or if questions in parallel domains provide implicit or explicit memory prompts that aid the process of recall. An alternative but not mutually exclusive hypothesis is that recall of the timing of an event declines with duration unless the dating of an event is frequently "rehearsed." We investigate these hypotheses by comparing the quality of demographic data supplied by female respondents on selected event history outcomes across multiple nationally representative surveys. A first outcome concerns the interval between a first and second birth. We compare birth interval data using birth registration data using micro data from the Vital Statistics on Natality (VSN), the June Current Population Survey (CPS), the 1979 - 94 waves of the National Longitudinal Survey of Youth (NLSY). and the 1988 National Survey of Family Growth (NSFG). Despite marked differences in survey design, we find relatively few differences in the quality of birth interval data across the four surveys. A second outcome is age at first sexual intercourse. Using data from the NLSY and NSFG, we analyze a form of partially missing data (respondent inability to recall the calendar month of intercourse) on age at first intercourse that occurs in both surveys. We find that inability to recall calendar month varies significantly with duration of recall, race and ethnicity, ability, early initiation of sexual activity, and some interview characteristics. Observed difference s by race and ethnicity narrow substantially when controlling for additional background factors available in the NLSY. In addition, we find important nonlinearities in respondent recall with duration, with results from both nonparametric and confirmatory analyses suggesting strikingly similar patterns of nonlinearities for both NLSY and NSFG respondents.
	Bibliography Citation Wu, Lawrence L., Steven P. Martin and Daniel A. Long. "Comparing Data Quality of Fertility and First Sexual Intercourse Histories." CDE Working Paper No. 99-08 (October, 1998), Center for Demography and Ecology, University of Wisconsin - Madison, revised, April 1999.

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