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Table 2: Costs and benefits of two years compensatory preschool education
Use real discount rate of 8 percent.
All estimates beyond age 19 are reduced by 75 percent.
Treatment group is found to have lower number of arrests and lower teenage pregnancy incidences compared to the control group.
Estimates of the social cost per crime:
At age 19, the group of preschool attendants showed more economic success than the control group.
Table 1: Characteristics of treatment and control groups
Participants were recruited by contacting parents of children attending the Perry elementary school and seeking information from parents with preschoolers about other families with preschoolers.
Children of appropriate age with low family socio-economic condition rating took an IQ test. The ones who had scores 1 or 2 standard deviation below the mean, and did not have disability and have no sign of organic causation for mental retardation were eligible for the program.
Each group of children entering the program was ranked by IQ score and was matched with the next child with closest IQ score to form a pair. One member of each pair was randomly assigned to form two groups.
There are two exceptions.
4 teachers were supposed to serve the 2 waves in every year by visiting households of the corresponding participants from 1962 to 1965. As 4 teachers visited the designated households in the two waves, preschooling-in-home set up five a week in the afternoon, which lasted 150 minutes daily. The important thing in teachers’ preschooling is that parents (mothers) had to stay with their children for better discussion with those teachers.
It is a federally funded project started in 1962 in Ypsilanti, Michigan, aimed at investigating if a preschool education program could improve the school performance of children under study, which was comprised of children from low income black families which had historically unsatisfactory performance in school. A total of 128 children aging 3 and 4 years entered the project which 123 of them completed the preschool years.