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No aspect of the massive participation in content creation that the web enables is more evident than in the countless number of opinions, news and product reviews that are constantly posted on the Internet. Given their importance their temporal evolution was analyzed in a number of scenarios. It was found that ignorance of previous views leads to a uniform sampling of the range of opinions among a community. Exposure of previous opinions to potential reviewers induces a trend following process which leads to the expression of increasingly extreme views. When the expression of an opinion is costly and previous views are known, a selection bias softens the extreme views, as people exhibit a tendency to speak out differently from previous opinions.

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Format:PDFSize:138 KB
Date:Sep 2007
Pages:12

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