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Hm, maybe I should mention that in the article. --[[User:Ed Poor|Uncle Ed]] 20:00, 21 November 2006 (UTC)
: Yes, but he does touch on errors made during research; e.g., he discusses the problem of response rate in surveys and the problem of comparing apples to oranges when talking about whether a survey of Yale graduates' income can be compared to the Census Bureau's average income of all Americans.
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