J. Mark Iwry, House Committee on Ways and Means, Subcommittee on Select Revenue Measures, June 26, 2008
Sima J. Gandhi, The Brookings Institution, June 2008
The Honorable Jim Cooper (D-TN) and The Honorable Paul Ryan (R-Wisc.), June 18, 2008
Alice M. Rivlin and John W. Kingdon, The News & Observer (Raleigh), June 17, 2008
Akash Deep and Robert Z. Lawrence, Hamilton Project Discussion Paper, June 2008