A new paper released on Monday via the National Bureau of Economic Research claims that retaining search log data doesn't do much for search quality. "Data retention has implications in the debate over Europe's right to be forgotten, the authors suggest, because retained data undermines that right," reports The Register. "It's also relevant to U.S. policy discussions about privacy regulations." From the report: To determine whether retention policies affected the accuracy of search results, Chiou and Tucker used data from metrics biz Hitwise to assess web traffic being driven by search sites. They looked at Microsoft Bing and Yahoo! Search during a period when Bing changed its search data retention period from 18 months to 6 months and when Yahoo! changed its retention period from 13 months to 3 months, as well as when Yahoo! had second thoughts and shifted to an 18-month retention period. According to Chiou and Tucker, data retention periods didn't affect the flow of traffic from search engines to downstream websites. "Our findings suggest that long periods of data storage do not confer advantages in search quality, which is an often-cited benefit of data retention by companies," their paper states. Chiou and Tucker observe that the supposed cost of privacy laws to consumers and to companies may be lower than perceived. They also contend that their findings weaken the claim that data retention affects search market dominance, which could make data retention less relevant in antitrust discussions of Google.
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