The Costs and Benefits of Investing in Universal Preschool: Evidence From a Spanish Reform.

This study provides a cost-benefit analysis of expanding access to universal preschool education, focusing on a Spanish reform that lowered the age of eligibility for publicly provided universal preschool from age 4 to age 3. Benefits in terms of child development and maternal employment are estimated using evidence on the causal effects of this reform. In the baseline estimation the benefit-cost ratio is over 4, indicating sizeable net societal benefits of the preschool investment.