William T. Gormley|Ted Gayer|Deborah Phillips|Brittany Dawson
The Effects of Universal Pre-K on Cognitive Development.
Public Policy Institute of California|Georgetown University
study oklahomas universal prek program authors relied strict birthday eligibility criterion compare young kindergarten children completed prek old prek children beginning prek regressiondiscontinuity design reduces threat selection bias sample consisted 1567 prek children 1461 kindergarten children completed prek authors estimated impact prek treatment woodcockjohnson achievement test scores authors found test impacts 300 points 079 standard deviation control group letterword identification score 186 points 064 standard deviation control group spelling score 194 points 038 standard deviation control group applied problems score hispanic black white native american children benefit program children diverse income brackets measured school lunch eligibility status authors conclude oklahomas universal prek program succeeded enhancing school readiness diverse group children