1. Center for the Study of Higher and Postsecondary Education, Ann Arbor, Michigan, USA
2. Graduate School of Education, Harvard University, Cambridge, Massachusetts, USA
3. Research Division, College Board, Washington, District of Columbia, USA
4. Customer Trust and Partner Services, Amazon.com, Bellevue, Washington, USA
5. Department of Policy Analysis and Management, Cornell University, Ithaca, New York, USA