Excerpt from the executive summary:
Kentucky officials are being encouraged to expand the availability of Kentucky’s state-funded preschool program. The current program restricts eligibility to three- and four-year-old students with disabilities and four-year-old students with family incomes up to 150 percent of the federal poverty level.
Jepsen, Christopher; Troske, Kenneth R.; and Brasher, Casey, "Estimates of the Costs and Benefits of Expanding the Early Childhood Education Program in Kentucky" (2009). CBER Research Report. Paper 5.