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David Calhoun, Chairman-CEO, Nielsen Co.

Published on .

To harness the power of the company's brand, Calhoun has advocated the "one Nielsen" approach, integrating the media measurement titan's name into virtually all its business units. Despite a 6% decline in revenue in the first half of this year, the company's operating income, when adjusted for restructuring costs and currency fluctuations, improved by 10%.
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