Martha Bailey · American Economic Review 2021 · quasi-experimental natural experiment using administrative data · n=?

Prep School for Poor Kids: The Long-Run Impacts of Head Start on Human Capital and Economic Self-Sufficiency

Cited 128 times in the scientific literature.

Level 2 - randomized trial

Level 2 by design analogy (quasi-experimental natural experiment using county rollout and age eligibility cutoffs).

OpenAlex W3116444998 · doi:10.1257/aer.20181801 · record verified 2026-08-26

What was done

Researchers evaluated the long-run effects of Head Start using large-scale, restricted administrative data. Identification relied on the county-by-county rollout of Head Start between 1965 and 1980 combined with age-eligibility cutoffs for school entry.

What was found

Head Start participation led to substantial gains in educational attainment: - A 0.65-year increase in total schooling. - A 2.7 percent increase in high school completion. - An 8.5 percent increase in college enrollment. - A 39 percent increase in college completion.

Why it matters

This study provides evidence of large, durable returns across adulthood from public investments in means-tested preschool education.

Limits

The abstract does not report the total sample size (n). Findings are based on historical rollouts from 1965 to 1980 and may not fully generalize to contemporary preschool settings or counterfactual alternatives. Non-educational outcomes (such as specific earnings or health metrics) are not quantified in the abstract.

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