Job Training Partnership Act (JTPA) National RCT

Summary

The JTPA evaluation is one of the most important experiments in US social policy — not because it confirmed what worked, but because it documented what didn't. The null result for adult men and the negative short-term effect for youth directly contradicted the program's rationale. The design contributed to a shift in federal workforce policy: from generic skills training toward employer-linked sectoral programs. The contrast between JTPA's null effects and Year Up's 30% earnings effect illustrates why mechanism matters: generic training produces credentials; sectoral training produces employment. The JTPA study established a baseline for what 'rigorous evaluation of job training' requires and influenced the design of every subsequent workforce program evaluation.

Research question

"Does federally funded job training increase earnings for adult men, adult women, and out-of-school youth?"

Methodology

Result

Mixed

Adult women: +$1,500 earnings at 30 months (+12%); adult men: no statistically significant effect; out-of-school youth: negative effect during training; female youth: small positive effect

Evidence strength

Strong

Randomized trial, replicated across multiple sites or studies.

Replication status

Replicated