GroupM Revises Down Global Ad Investment Growth To 4.5 Percent In 2016 (PR Newswire)

Digital Advertising Acceleration Slows But Remains Strong; ‘New World’ Traditional Media Investment Decreases for the First Time LONDON and NEW YORK, Dec. 7, 2015 /PRNewswire/ — WPP’s GroupM, the world’s leading media investment management group responsible for nearly one-third of global advertising investment, today issued its bi-annual global advertising expenditure forecast which predicts ad investment growth…

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