NEW YORK -- MasterCard International said it has assigned media-buying responsibility for its $60 million advertising account to DeWitt Media Inc. of New York.

The announcement came on the heels of MasterCard's appointment of Ammirati & Puris as its advertising agency, replacing Lintas: New York. MasterCard said DeWitt, which beat out nine competitors for the job, will collaborate with Ammirati on strategy development and planning.

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