Head Start statistics
These statistics are incredible, not just because of the fact that they were collected for over 40 years, but also the simple impact of them given the almost trivial cost.
Most remarkably, the impact of those preschool years still persists. By almost any measure we might care about -- education, income, crime, family stability -- the contrast with those who didn't attend Perry is striking. When they were 27, the preschool group scored higher on tests of literacy. Now they are in their 40's, many with children and even grandchildren of their own. Nearly twice as many have earned college degrees (one has a Ph.D.). More of them have jobs: 76 percent versus 62 percent. They are more likely to own their home, own a car and have a savings account. They are less likely to have been on welfare. They earn considerably more -- $20,800 versus $15,300 -- and that difference pushes them well above the poverty line.