By medium, ZO reports that the Internet will be the only medium to grow global ad spending in 2009 — by 9.5 percent. “In a time when marketing departments have to justify every dollar they spend, the rapid and clear returns offered by Internet advertising are more attractive than the longer-term brand-building benefits offered by other media,” ZO said. And next year, spending in the medium will increase further — by 12 to 13 percent, the agency net said.

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