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. Author manuscript; available in PMC: 2018 Aug 28.
Published in final edited form as: J Health Econ. 2018 May 7;60:1–15. doi: 10.1016/j.jhealeco.2018.04.002

Table A1.

SC Medicaid Sample Population Characteristics. First-time enrollees (since 2004).

Characteristics 2004 2006 2008 2010 2012 2014
Medicaid enrollment characteristics
Age 1 st enrolled 2.8 2.6 2.8 3.9 3.4
Years enrolled 7.2 6.3 5.0 3.6 2.0
Months enrolled in year 6.5 6.4 6.5 5.9 6.6
Family net income
Monthly income, if >0 1,015.9 1,146.8 1,244.7 1,417.2 2,141.7
Missing, % 2.6% 2.5% 2.6% 7.1% 1.8%
Zero, % 63.2% 58.0% 57.9% 72.8% 77.1%
Demographics
Male 50.6% 50.4% 49.9% 50.0% 50.8%
Age 2.8 2.6 2.8 3.9 3.4
Race: White 43.4% 43.1% 46.2% 48.0% 48.5%
 Black 41.2% 39.4% 37.5% 38.5% 37.0%
 Hispanic 12.1% 13.5% 10.9% 8.4% 8.6%
N obs. 32,733 33,885 33,078 38,616 38,412
Birth certificate data
Birth weight, g 3179 3195 3202 3218 3227
Mother’s age 24.2 24.4 25.0 25.6 26.3
School: Elem 6.2% 6.2% 5.0% 3.3% 3.2%
 High school 27.5% 25.7% 22.9% 19.1% 16.4%
 High school diploma 34.7% 34.2% 33.1% 32.7% 31.1%
 Some college 23.3% 24.6% 26.8% 29.9% 30.4%
 College diploma 8.4% 9.3% 12.2% 15.1% 19.0%
N obs. 22,869 23,647 23,331 24,402 23,766

Notes: The table is based on a 60% random sample of SC Medicaid population under 17 years old in 2004–2015, excluding children in foster care and disabled children. Birth certificates data are available for in-state births for children born after 1992. These records are matched to Medicaid records on name, date of birth, race, gender, and hospital of birth, when available. Note that the later they enroll, the fewer years they will appear in our sample.