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. Author manuscript; available in PMC: 2017 Apr 1.
Published in final edited form as: Econ J (London). 2016 Dec 7;126(596):F28–F65. doi: 10.1111/ecoj.12420

Table 1.

ABC and PPP: Main Characteristics and Eligibility Criteria

Abecedarian Perry
Main Characteristics
Location: Chapel Hill, NC Location: Ypsilanti, MI
Racial Composition: 98% African American Racial Composition: All African American
Age of Child: 0–5 Age of Child: 3–5
Sample Size: 111 (57T, 54C) Sample Size: 123 (58T, 65C)
Intervention Year: 1972 – 1982 Intervention Year: 1962 – 1967
Follow-up: Through Mid 30s (2010–2012) Follow-up: Through Age 40 (2000–2002)
Intensity: 40 hrs/week (8 hrs/day for 5 days/week) for 50 weeks/year Intensity: 12.5 to 15 hrs/week (2.5 to 3 hrs/day for 5 days/week) for 30 weeks/year (mid-Oct. through May)
+ 1.5 hrs/week of home visits
+ 1 monthly parent group meeting
Number of years: 5 years at ages 0–5 Number of years: 2 yrs at ages 3–5 for cohorts 1–4; 1 yr for first cohort
Cost per child/year: 12,955 (2010$)* Cost per child/year: 9,604 (2010$)
Eligibility Criteria
Requirement: No apparent biological conditions Requirement: Child IQ<85 (“educably mentally retarded”)
Weighted Scale: High Risk Index:†

  1. mother’s educational level (last grade completed)

  2. father’s educational level (last grade completed)

  3. family income (dollars per year)

  4. father absent for reasons other than health or death

  5. absence of maternal relatives in local area

  6. siblings of school age one or more grades behind age-appropriate level or with equivalently low scores on school-administered achievement tests

  7. payments received from welfare agencies in past 3 yrs

  8. record of father’s work indicates unstable or unskilled semiskilled labor

  9. mother’s or father’s IQ ≤90

  10. sibling’s IQ ≤90

  11. relevant social agencies in the community indicate the family is in need of assistance

  12. one or more members of the family has sought counsel-ling or professional help the past 3 yrs

  13. special circumstances not included in any of the above likely contributors to cultural or social disadvantage

 Weighted Scale: Cultural Deprivation Scale:‡
parents’ average years of schooling at entry/2 +
father’s occupational status at entry*2 +
2*(rooms/persons in home at entry)

Notes:

*

This figure is inclusive of the health care costs (the figure reported in Barnett and Masse (2007) is not). Estimated from cost-benefit analysis conducted on both PPP and ABC projects.