Until the late 1990s, reputations of most advertising agencies were established on their creative expertise rather than on their total performance, including delivery of various ancillary support functions.

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The Answer of Until the late 1990s, reputations of most advertising agencies were established on their creative expertise rather than on their total performance, including delivery of various ancillary support functions.

Until the Late 1990s, Reputations of Most Advertising Agencies Were