| web | Paul Davidson | USA TODAY | 2019-11-07 | |
| web | Matthew Rothenberg | Mediafeed | 2019-08-05 | |
| web | Mark Hulbert | MarketWatch | 2018-07-01 | |
| web | Ed Leefeldt | CBS News | 2018-02-03 | |
| web | Emily Brandon | US News and World Report | 2011-03-15 | |
| web | David Rosnick and Dean Baker | 2009-02-25 |