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New challenges ahead for Google

18 October 2012 Last updated at 11:42 BST

Google dominates internet searches with nearly 67% of the market, outranking its rivals and making it a leader in 'pay per click' advertising.

However the amount it can charge firms each time a user clicks on a link is falling, and as more and more people use the search engine on their smart phones, analysts are keen to see what it has to say about its search advertising revenue.

Ben Thompson reports from New York