EdSight

Eric A. Hanushek is an American economist whose work over more than five decades effectively founded the modern economics of education and reoriented education policy worldwide from a preoccupation with inputs to a sustained focus on learning outcomes. Long based at the Hoover Institution at Stanford University, Hanushek came to education research at a moment — the late 1960s and early 1970s — when the policy debate in the United States and across the developed and developing world was dominated by the assumption that additional resources (larger budgets, smaller class sizes, higher teacher salaries) would straightforwardly produce better student outcomes. Between 1960 and 1983, current expenditures on U.S. schooling rose by 135 percent in real terms and pupil-teacher ratios fell by more than a quarter, yet graduation rates barely moved and there was no evidence of quality improvements. Hanushek took advantage of what made education unusual among public sectors — the availability of direct measures of outcomes in the form of student test scores — and, building on (and methodologically correcting) the framework introduced by the Coleman report (1966), applied rigorous econometric analysis to the question of how schools actually produce learning. The result was a series of findings that overturned conventional wisdom: input-based indicators such as class size and expenditure per pupil were not consistently related to student achievement; individual teachers and principals, by contrast, produced enormous and measurable differences in student learning; school attendance was a poor proxy for human capital in growth models, because the quality of cognitive skills — not years of schooling — was what drove economic growth. Across landmark articles in the American Economic Review, the Journal of Economic Literature, and the Economic Journal, and in the book The Knowledge Capital of Nations with Ludger Woessmann (2015), Hanushek gave the field of economics of education its central concepts of value added, efficiency, and test-based accountability, and provided the empirical foundation for the standards-and-accountability reforms that reshaped U.S. and international education policy from the 1990s onward.

Hanushek's foundational contribution, developed from his 1971 American Economic Review article through his 1986 Journal of Economic Literature synthesis and onward, was the empirical demonstration that additional educational resources — larger budgets, smaller classes, higher teacher salaries — are not consistently related to improvements in student learning. “Schools differ dramatically in 'quality,'” he argued, “but not because of the rudimentary factors that many researchers (and policymakers) have looked to for explanations of this difference.” Using microdata from a large California school system and subsequently replicating the findings with larger datasets and in international comparisons, Hanushek established that state-level increases in per-pupil expenditure showed no systematic correlation with gains in NAEP achievement. The policy implication was not that resources are irrelevant, but that the debate needed to shift from how much is spent to how resources are used — introducing the analytic vocabulary of efficiency into an education sector that had largely resisted it.

• Hanushek, E. A. (1971). Teacher characteristics and gains in student achievement: Estimation using micro data. American Economic Review, 60(2), 280–288.
• Hanushek, E. A. (1986). The economics of schooling: Production and efficiency in public schools. Journal of Economic Literature, 24(3), 1141–1177.
• Hanushek, E. A. (2003). The failure of input-based schooling policies. Economic Journal, 113(485), F64–F98.
• Hanushek, E. A., & Luque, J. A. (2003). Efficiency and equity in schools around the world. Economics of Education Review, 22(5), 481–502.
• Hanushek, E. A. (2016). What matters for achievement: Updating Coleman on the influence of families and schools. Education Next, 16(2), 22–30.

If individual teachers and principals produce the largest measurable differences in student learning, Hanushek argued, then accountability must be refocused on what happens inside classrooms rather than on inputs. He estimated that disadvantaged pupils taught by high-value-added teachers gain roughly a year and a half of learning while similar students taught by poor teachers gain only six months, and comparable magnitudes hold for principals. Acknowledging that accountability “has not been a reality … because accountability threatens many and because, even when desired, it is difficult to implement,” Hanushek's empirical work and advocacy nevertheless underwrote the standards-based accountability agenda of the 1990s and 2000s. Analyzing NAEP trends across U.S. states as accountability systems were introduced, he and Margaret Raymond (2005) found that test-based accountability produced clear positive effects on achievement, particularly where the systems “incorporated consequences for schools and personnel,” with no evidence of the predicted unintended outcomes in special-education placement rates. International panel analysis of six waves of PISA (Bergbauer, Hanushek, & Woessmann, 2022) extended the finding: standardized-test accountability improves outcomes in low- and medium-performing countries.

• Hanushek, E. A., & Raymond, M. E. (2001). The confusing world of educational accountability. National Tax Journal, 54(2), 365–384.
• Hanushek, E. A., & Raymond, M. E. (2005). Does school accountability lead to improved student performance? Journal of Policy Analysis and Management, 24(2), 297–327.
• Finn, C. E., Jr., & Hanushek, E. A. (2020). Test-based accountability in distressed times. The State Education Standard, 20(3), 13–17.
• Bergbauer, A. B., Hanushek, E. A., & Woessmann, L. (2022). Testing. Journal of Human Resources.
• Branch, G. F., Hanushek, E. A., & Rivkin, S. G. (2013). School leaders matter: Measuring the impact of effective principals. Education Next, 13(1), 62–69.

Hanushek's 1971 specification of the education production function — in which a student's achievement at the end of a period depends on prior achievement, family inputs, peer influences, innate ability, and school inputs cumulated over the period — reframed how economists and policymakers analyze schooling. By introducing achievement both at entry and exit, he launched what is now called “value-added” analysis, where the production function focuses on gains rather than levels. Complementing the specification with dichotomous student-teacher pair variables, he was the first to separate the learning gains attributable to individual teachers from those arising from families, peers, or prior schooling. The resulting finding — replicated many times since — is that “teacher quality is by far the most important factor” in student achievement, yet it is not closely related to observable credentials such as degrees, certification, or years of experience. Hanushek's own policy inference is correspondingly nuanced: there is “weak support for the notion that higher teacher salaries … will lead to improved student performance,” but recruitment, retention, and dismissal policies must be redesigned so that genuinely effective teachers can be attracted, rewarded, and kept in the classroom.

1. Prior achievement: the entering level of knowledge and skill, essential for isolating the period's value added.

2. Family and peer inputs: the cumulative influence of home environment and classmates during the period of schooling.

3. School inputs (teachers, leadership, resources): cumulative inputs of the school, with individual teacher effects identified through student-teacher pair indicators.

4. Innate student ability: a student-level component that must be accounted for to identify the school's contribution.

• Hanushek, E. A. (1971). Teacher characteristics and gains in student achievement. American Economic Review, 60(2), 280–288.
• Hanushek, E. A. (1992). The trade-off between child quantity and quality. Journal of Political Economy, 100(1), 84–117.
• Rivkin, S. G., Hanushek, E. A., & Kain, J. F. (2005). Teachers, schools, and academic achievement. Econometrica, 73(2), 417–458.
• Hanushek, E. A. (2011). The economic value of higher teacher quality. Economics of Education Review, 30(3), 466–479.
• Hanushek, E. A. (2020). Education production functions. In S. Bradley & C. Green (Eds.), The economics of education: A comprehensive overview (pp. 161–170). Academic Press.

Hanushek's most influential extension of his work beyond the schoolhouse was to growth economics. The dominant tradition — from Mincer (1974) through Barro (1991) — measured human capital by years of schooling, implicitly assuming that a year of secondary schooling in the United States was equivalent to a year at the same grade level elsewhere. Hanushek rejected the assumption and, with Dennis Kimko and later with Ludger Woessmann, adapted the standard growth model to include direct measures of cognitive skills drawn from a half-century of international assessments (PISA, TIMSS, and their predecessors). Once this adjustment was made, years of schooling lost its predictive power for growth rates of real GDP per capita; the “knowledge capital” measured by test scores became the dominant correlate. The implication was both methodological and substantive: growth analysis had been misspecified, and the economic returns to improving the quality of schooling were far larger than previously estimated — a finding whose projections have been used by the OECD and others to quantify the stakes of universal basic skills.

• Hanushek, E. A., & Kimko, D. D. (2000). Schooling, labor force quality, and the growth of nations. American Economic Review, 90(5), 1184–1208.
• Hanushek, E. A., & Woessmann, L. (2012). Do better schools lead to more growth? Cognitive skills, economic outcomes, and causation. Journal of Economic Growth, 17(4), 267–321.
• Hanushek, E. A., & Woessmann, L. (2015a). The knowledge capital of nations: Education and the economics of growth. MIT Press.
• Hanushek, E. A., & Woessmann, L. (2015b). Universal basic skills: What countries stand to gain. OECD.
• Hanushek, E. A., Link, S., & Woessmann, L. (2013). Does school autonomy make sense everywhere? Panel estimates from PISA. Journal of Development Economics, 104, 212–232.
• Hanushek, E. A., Piopiunik, M., & Wiederhold, S. (2019). Do smarter teachers make smarter students? International evidence on teacher cognitive skills and student performance. Education Next, 19(2), 56–64.

Across five decades of writing, Hanushek's program has become consolidated into a short list of propositions that now structure mainstream education policy discussion in much of the world. Most national education systems and the United Nations' Sustainable Development Goals now measure educational progress in terms of learning outcomes rather than attainment alone; No Child Left Behind and its successors in the United States, as well as comparable reforms in dozens of other countries, built their accountability architecture on the evidence base Hanushek helped to produce; and the international testing infrastructure itself — PISA participation grew from 48 to 79 economies between 2000 and 2018 — both reflects and is stimulated by the research program he launched. The four propositions together constitute the core of Hanushek's legacy and the research agenda he continues to pursue.

1. Focus on outcomes: “If one is interested in outcomes, one should focus on outcomes.” Education systems should measure and be evaluated on learning, not on expenditures or attainment.

2. Inputs alone do not improve performance: “Input policies have been vigorously pursued over [a] long period of time, but there is no evidence that the added resources have improved student performance.” Efficiency analysis must accompany any resource debate.

3. The great difference is great teachers: teacher quality is the dominant school-side determinant of achievement, yet it is poorly predicted by credentials — implying that recruitment, evaluation, and dismissal policies must be redesigned around effectiveness.

4. Quality education drives growth and well-being: improvements in cognitive skills, not in years of schooling, produce substantial long-run economic gains, both for developing countries reaching basic proficiency and for developed countries that close gaps with high performers.

• Hanushek, E. A. (2003). The failure of input-based schooling policies. Economic Journal, 113(485), F64–F98.
• Hanushek, E. A. (2010). The difference is teacher quality. In K. Weber (Ed.), Waiting for “Superman”: How we can save America's failing public schools (pp. 81–100). PublicAffairs.
• Hanushek, E. A., & Raymond, M. E. (2005). Does school accountability lead to improved student performance? Journal of Policy Analysis and Management, 24(2), 297–327.
• Hanushek, E. A., & Woessmann, L. (2015a). The knowledge capital of nations. MIT Press.
• Hanushek, E. A., & Woessmann, L. (2015b). Universal basic skills: What countries stand to gain. OECD.

• Hanushek, E. A. (1971). Teacher characteristics and gains in student achievement: Estimation using micro data. American Economic Review, 60(2), 280–288.
• Hanushek, E. A., & Kain, J. F. (1972). On the value of “equality of educational opportunity” as a guide to public policy. In F. Mosteller & D. P. Moynihan (Eds.), On equality of educational opportunity (pp. 116–145). Random House.
• Hanushek, E. A. (1986). The economics of schooling: Production and efficiency in public schools. Journal of Economic Literature, 24(3), 1141–1177.
• Hanushek, E. A. (1992). The trade-off between child quantity and quality. Journal of Political Economy, 100(1), 84–117.
• Hanushek, E. A., & Kimko, D. D. (2000). Schooling, labor force quality, and the growth of nations. American Economic Review, 90(5), 1184–1208.
• Hanushek, E. A., & Raymond, M. E. (2001). The confusing world of educational accountability. National Tax Journal, 54(2), 365–384.
• Hanushek, E. A. (2003). The failure of input-based schooling policies. Economic Journal, 113(485), F64–F98.
• Hanushek, E. A., & Luque, J. A. (2003). Efficiency and equity in schools around the world. Economics of Education Review, 22(5), 481–502.
• Rivkin, S. G., Hanushek, E. A., & Kain, J. F. (2005). Teachers, schools, and academic achievement. Econometrica, 73(2), 417–458.
• Hanushek, E. A., & Raymond, M. E. (2005). Does school accountability lead to improved student performance? Journal of Policy Analysis and Management, 24(2), 297–327.
• Hanushek, E. A. (2010). The difference is teacher quality. In K. Weber (Ed.), Waiting for “Superman”: How we can save America's failing public schools (pp. 81–100). PublicAffairs.
• Hanushek, E. A. (2011). The economic value of higher teacher quality. Economics of Education Review, 30(3), 466–479.
• Hanushek, E. A., & Woessmann, L. (2012). Do better schools lead to more growth? Cognitive skills, economic outcomes, and causation. Journal of Economic Growth, 17(4), 267–321.
• Hanushek, E. A., Link, S., & Woessmann, L. (2013). Does school autonomy make sense everywhere? Panel estimates from PISA. Journal of Development Economics, 104, 212–232.
• Branch, G. F., Hanushek, E. A., & Rivkin, S. G. (2013). School leaders matter: Measuring the impact of effective principals. Education Next, 13(1), 62–69.
• Hanushek, E. A., & Woessmann, L. (2015a). The knowledge capital of nations: Education and the economics of growth. MIT Press.
• Hanushek, E. A., & Woessmann, L. (2015b). Universal basic skills: What countries stand to gain. OECD.
• Hanushek, E. A. (2016). What matters for achievement: Updating Coleman on the influence of families and schools. Education Next, 16(2), 22–30.
• Hanushek, E. A., Piopiunik, M., & Wiederhold, S. (2019). Do smarter teachers make smarter students? International evidence on teacher cognitive skills and student performance. Education Next, 19(2), 56–64.
• Finn, C. E., Jr., & Hanushek, E. A. (2020). Test-based accountability in distressed times. The State Education Standard, 20(3), 13–17.
• Hanushek, E. A. (2020). Education production functions. In S. Bradley & C. Green (Eds.), The economics of education: A comprehensive overview (pp. 161–170). Academic Press.
• Bergbauer, A. B., Hanushek, E. A., & Woessmann, L. (2022). Testing. Journal of Human Resources.
• Coleman, J. S., et al. (1966). Equality of educational opportunity. U.S. Government Printing Office.
• Barro, R. J. (1991). Economic growth in a cross section of countries. Quarterly Journal of Economics, 106(2), 407–443.
• Mincer, J. (1974). Schooling, experience, and earnings. NBER.
• Woessmann, L. (2016). The importance of school systems: Evidence from international differences in student achievement. Journal of Economic Perspectives, 30(3), 3–32.