Divvying up chief executive responsibilities has had mixed results
THE GOODCompany: California Pizza KitchenCEOs: Rick Rosenfield and Larry FlaxSkinny: Together they founded the high-end pizza chain in 1985 and still run it today.
THE BADCompany: Kraft FoodsCEOs: Betsy Holden and Roger DeromediSkinny: They shared the top job from 2001 to 2003. Then Holden was demoted amid sagging sales and left.
THE UGLYCompany: CitigroupCEOs: Sandy Weill and John ReedSkinny: They had a tense relationship after the 1998 merger of Citicorp and Travelers. In 2000, Reed left.