Data-Driven Decision Making: Where It Wins and Where It Lies

What has been corrected on this page?

Every accepted correction to this page is recorded with the exact change, so readers can see how the page improved over time.

1. 29 July 2026 · corrected by Melik Can Sariyer

   Corrected three citation errors: a real MIT study (Brynjolfsson, Hitt, and Kim 2011, Strength in Numbers) was misattributed to a different, unrelated 2016 Brynjolfsson and McElheran paper in two places, and separately misattributed to Harvard in a summary list; also corrected a McKinsey customer-retention multiplier from 6x to the real figure of 9x.

   What the page claimed

   Reference list and in-body text cited Brynjolfsson and McElheran 2016 for the 179-firm, 5-6 percent productivity finding, which actually comes from Brynjolfsson, Hitt, and Kim 2011; a separate summary attributed the same finding to a nonexistent Harvard study; McKinsey customer-retention figure was stated as 6x.

   What was corrected

   Corrected the citation to Brynjolfsson, Hitt, and Kim 2011, Strength in Numbers, in both the reference list and body text; corrected the summary attribution from Harvard to MIT; corrected the McKinsey retention multiplier to the real figure of 9x.

   Why: Verified each named-study claim against the real research literature; the underlying figures were accurate but attached to the wrong paper or institution in three places, and one number had been altered.

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