"... the Columbia University economist has been left out in the cold, even though he was expecting at least an offer. (Stiglitz, traveling in Brazil, could not be reached.) Especially since Stiglitz supported Obama long before most of the others named to his cabinet (at a time when Summers was a key advisor to Hillary Clinton). “Who knows why? Obama has been choosing center-right people,” said the source, an associate of Stiglitz’s who would speak only on condition of anonymity. She went on to say that Stiglitz’s long-time enmity with Summers—whose ideas, Obama said last week, “will be the foundation of all my economic policies”—may be a factor. “Larry’s had it in for Joe for decades,” she said."
http://harpers.org/archive/2008/12/hbc-90003962