AS CALIFORNIA voters consider whether to vote for Proposition 82 -- the ballot measure that would fund preschool for 4-year-olds in the state -- attention has focused on a Rand Corp. report we wrote last year documenting the value of preschool education.
Our study concluded that making a high-quality preschool program available to every 4-year-old would generate an estimated $2 to $4 in benefits to California society for every $1 spent. And the cost of such a universal preschool program is more than outweighed by the benefits -- even using very conservative assumptions.
We did not study the specifics of Proposition 82 or the proposed tax on the wealthiest Californians to fund the measure. And, as a nonprofit, nonpartisan organization that conducts research and analysis, Rand does not take positions on ballot initiatives.
But by examining high-quality preschool programs elsewhere, we were able to conclude that children who attend preschool are likely to do better in school and go on to graduate high school, are less likely to be convicted of crimes and are more likely to earn higher salaries as adults. All this saves governments money and boosts tax revenues. The families of children attending preschool benefit from lower child-care costs. And Californians also gain from lower crime rates.
Critics have questioned how we can be so sure that preschool generates $2 to $4 in societal benefits for every $1 spent. In an ideal world, we would have looked to other states or cities to evaluate the short-term and longer-term effects of their universal preschool programs. Unfortunately, no such studies are available.
What is available is a rigorous body of research that has demonstrated short- and long-term benefits for at-risk children who attended high-quality preschool programs for one or two years before kindergarten. One such public program, the Chicago Child-Parent Centers, serves primarily minority children in low-income neighborhoods; it followed youths from preschool until age 20.
Critics say the Chicago results don't tell us what would happen in California because the Chicago program differs from what is proposed under Proposition 82 and served a different mix of children. It's true that the ongoing Chicago program includes both preschool and additional support for at-risk children in grades K-3. But we were careful to count only the measured benefits from the half-day preschool component. And while the Chicago program served only poor children, we adjusted our calculations to account for the presence of children from all income levels who would be served by a universal program.
