Eric Hanushek is the Paul and Jean Hanna Senior Fellow at the Hoover Institution of Stanford University. A leader in the development of economic analysis of educational issues, his research spans the impact of teacher quality, high-stakes accountability, and class-size reduction on achievement. He pioneered measuring teacher quality on the basis of student achievement, the foundation for current research into the value-added of teachers and schools. His work on school efficiency is central to debates about school finance adequacy and equity, while analyses of the economic impact of school outcomes motivate both national and international educational policy design.