If the search engineers at Google want evidence that their recent adjustment of their algorithm to favor higher-quality content is having the intended effect on content creators, they need look no further than the PaidContent 2011 conference.

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Conceding the point, Dow has cut back production of chemicals in North America and is content, in effect, to collect a fee for showing the Arabs how to run a chemical plant.

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The changes will have a minimum effect on content, said the firm.

BBC: Newspaper printing jobs at risk