Infant health production functions: what a difference the data make.
We examine the extent to which infant health production functions are sensitive to model specification and measurement error. We focus on the importance of typically unobserved but theoretically important variables (typically unobserved variables, TUVs), other non-standard covariates (NSCs), input reporting, and characterization of infant health. The TUVs represent wantedness, taste for risky behavior, and maternal health endowment. The NSCs include father characteristics. We estimate the effects of prenatal drug use, prenatal cigarette smoking, and first trimester prenatal care on birth weight, low birth weight, and a measure of abnormal infant health conditions. We compare estimates using self-reported inputs versus input measures that combine information from medical records and self-reports. We find that TUVs and NSCs are significantly associated with both inputs and outcomes, but that excluding them from infant health production functions does not appreciably affect the input estimates. However, using self-reported inputs leads to overestimated effects of inputs, particularly prenatal care, on outcomes, and using a direct measure of infant health does not always yield input estimates similar to those when using birth weight outcomes. The findings have implications for research, data collection, and public health policy.
Reichman
Nancy E
NE
Department of Pediatrics, Robert Wood Johnson Medical School, University of Medicine and Dentistry of New Jersey, New Brunswick, NJ 08903, USA. reichmne@umdnj.edu
Corman
Hope
H
Noonan
Kelly
K
Dave
Dhaval
D
D006306:Health Surveys; D006801:Humans; D007223:Infant; D007229:Infant Welfare / Q000706:statistics & numerical data; D007230:Infant, Low Birth Weight; D007231:Infant, Newborn; D007407:Interviews as Topic; D008485:Medical Audit; D011159:Population Surveillance / Q000379:methods; D011295:Prenatal Care; D012907:Smoking; D019966:Substance-Related Disorders
Am Econ Rev. ;92(5):1308-34
29058397
Demography. 2002 Feb;39(1):199-213
11852837
Fam Plann Perspect. 2000 Mar-Apr;32(2):56-64
10779236
J Health Econ. 1991 Oct;10(3):291-311
10170854
Health Serv Res. 1999 Apr;34(1 Pt 1):145-70
10201856
BMJ. 2001 Aug 11;323(7308):310-4
11498487
Fam Plann Perspect. 1998 Sep-Oct;30(5):223-30
9782045
Acta Obstet Gynecol Scand Suppl. 1997;165:8-13
9219450
Future Child. 1995 Spring;5(1):35-56
7633866
Matern Child Health J. 2005 Jun;9(2):151-8
15965620
Health Serv Res. 2005 Feb;40(1):117-34
15663705
J Subst Abuse Treat. 1999 Apr;16(3):195-219
10194738
J Drug Issues. 1999 Apr 1;29(2):203-214
34321695
Health Econ. 2007 Apr;16(4):361-84
17001753
Demography. 2002 May;39(2):353-68
12048956
Ann Epidemiol. 2001 Apr;11(3):186-93
11248582
Matern Child Health J. 2000 Mar;4(1):39-52
10941759
Am J Obstet Gynecol. 2007 Jul;197(1):32.e1-8
17618747
Eur J Obstet Gynecol Reprod Biol. 2004 Sep 10;116(1):3-15
15294360
J Matern Fetal Neonatal Med. 2004 Apr;15(4):253-9
15280134
J Health Econ. 2005 Mar;24(2):365-89
15721050
Obstet Gynecol. 2006 Aug;108(2):469-77
16880322
Women Health. 1997;26(4):29-43
9525267
Am J Drug Alcohol Abuse. 1993;19(4):423-41
8273764
Demography. 1990 Feb;27(1):1-17
2303132
Pediatrics. 1995 Aug;96(2 Pt 1):364-7
7630703
Future Child. 2005 Spring;15(1):91-116
16130543
Matern Child Health J. 2003 Dec;7(4):239-52
14682501
J Health Econ. 2004 May;23(3):493-503
15120467
Demography. 1987 Aug;24(3):407-12
3678541
J Matern Fetal Neonatal Med. 2003 Jun;13(6):362-80
12962261
Matern Child Health J. 2005 Jun;9(2):159-63
15965621
J Health Econ. 2005 May;24(3):489-513
15811540
Demography. 2005 Feb;42(1):91-108
15782897
J Subst Abuse. 1997;9:63-76
9494939
Am J Public Health. 2006 May;96(5):862-6
16571696
Future Child. 1995 Spring;5(1):121-38
7633859
Br J Health Psychol. 2005 May;10(Pt 2):255-68
15969853