He was formerly a guest scholar in governance studies at the Brookings Institution, Washington, D.C., USA. Paul E. Peterson is the Henry Lee Shattuck Professor of Government at Harvard, the director of PEPG, and a senior fellow at the Hoover Institution, USA. He is author or editor of numerous books, including The Education Gap: Vouchers and Urban Schools , with William G. Howell (Brookings, 2004 and 2006). He is coeditor (with Martin West) of No Child Left Behind? The Practice and Politics of School Accountability (Brookings, 2003).