Datasets from an impact evaluation of a targeted prekindergarten program.

Given general trends in extant research on the impact of prekindergarten and that the structure and implementation of prekindergarten programs vary by state, researchers, educators, and policymakers are raising questions about what works, for whom, under what conditions, and the cost-benefit of such endeavors. Yet not all states have formally examined program impacts and few datasets have been expressly collected to evaluate effects. The current data article represents empirical examinations in the state of Connecticut on the comparability of treatment and control groups, tests of the robustness of impact estimates, and the psychometric properties of outcome measures. Stata code for replication purposes is included.