| Author(s) | SIPP | CPS | NLSY | Other |
| Garrett, et al. | NLSY 1986 | |||
| O'Connell | SIPP 1984/85 panels | |||
| Leibowitz and Klerman |
1971-1990 June | |||
| Hofferth | NCCS 1990 & PCCS |
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| Glass and Riley |
4 pre-natal hospitals in Indiana 1991/92 |
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| Felmlee | NLS of Labor Market Experiences of Young Women (1968-73) |
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| Waldfogel, 1997 | NLSY 1991 (men and women) |
NLS-YW & NLS-YM |
Survey of Income and Program Participation (SIPP), Current Population Survey (CPS), National Longitudinal Study of Youth (NLSY), National Longitudinal Study (NLS), National Child Care Survey (NCCS), Profile of Child Care Settings (PCCS)