Kristin Dolan, the wife of Cablevision CEO James Dolan, has expanded her influence at the company after the exits of some top managers over the past few months. In November, she was named senior executive vice president of product management and marketing; each unit had been led by separate executives who are no longer with the company. Among her priorities are to improve Cablevision's customer retention and to rebrand its Optimum service to emphasize features such as access to Wi-Fi hot spots and an iPad application.

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