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Using an additional decade of CNLSY data, this study replicated and extendedDeming's (2009) evaluation of Head Start's life-cycle skill formation impactsin three ways. Extending the measurement interval for Deming's adulthoodoutcomes, we found no statistically significant impacts on earnings and mixedevidence of impacts on other adult outcomes. Applying Deming's siblingcomparison framework to more recent birth cohorts born to CNLSY mothersrevealed mostly negative Head Start impacts. Combining all cohorts showsgenerally null impacts on school-age and early adulthood outcomes.

Elusive Longer-Run Impacts of Head Start: Replications Within and Across Cohorts