Hal Varian: The Google Ad Economy

Google's Android software will soon be powering Motorola phones, but for the 11-year-old Internet giant, advertising is still king. Google beat analysts' estimates last quarter, thanks to brisk advertising sales. In October the company announced that its third-quarter revenue increased 7% from the same period last year, to $5.94 billion. Net income rose 27% to $1.64 billion. Google accounts for roughly a third of all online ad spending in the U.S.

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