In an article published this week Paul Krugman says the Bush administration will have a hard time finding a successor to Alan Greenspan, who is expected to retire next year. Feldstein and Hubbard are mentioned, but Krugman warns that appointing a "yes-man" to the job would spell disaster. He says Ben Bernanke's possible move to the Council of Economic Advisers could act as an audition for the top job at the Fed.

Click here to read the article "The Greenspan succession" on The New York Times