Global advertising expenditure will increase by 2.2% to $456 billion (€341bn; £299bn) this year, according to figures from ZenithOptimedia.
The media network, part of Publicis Groupe, has revised its previous forecast from last December, when it predicted worldwide adspend would rise by 0.9% on an annual basis in 2010.
"Confidence in the global economic recovery, while tentative, continues to grow, and this improvement has been apparent in ad markets across the world," the company said.
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