Guo

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Talk pages: Archive or leave alone others' comments

Hi Guo! Please don't erase others' comments on talk pages (unless it's your personal talk page, here), as you did at Talk:Regression discontinuity design. You may archive old comments, but not erase them. Thanks!  Kiefer.Wolfowitz 14:08, 16 July 2011 (UTC)

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added links pointing to Rank, Standard error, Panel and OLS

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