Understanding the Observer Effect in Measurement

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1. 11 July 2026 · corrected by Emir Baycan

   2 corrections applied: Levitt & List (2011) Hawthorne reanalysis was published in the American Economic Journal: Applied Economics, per the article's own reference list. | Wadhera et al. HRRP-mortality study was published in JAMA (2018), not NEJM, per the article's own reference list (which dates it 2018).

   Before

   published a 2011 paper in the American Economic Review reanalyzing... a 2019 study in the New England Journal of Medicine by Wadhera et al.

   After

   published a 2011 paper in the American Economic Journal: Applied Economics reanalyzing... a 2018 study in JAMA by Wadhera et al.

   Why: Corrected two journal/year misattributions: Levitt & List (2011) Hawthorne reanalysis appeared in American Economic Journal: Applied Economics, and the Wadhera et al. HRRP-mortality study was published in JAMA (2018), not NEJM (2019), per the article's own reference list. Verified already live in body content; FAQ had no mention of either study.

   Note: the bibliography's Wadhera entry itself still lists '(2019)' rather than the JAMA vol 320 issue 24 (Dec 2018) date, a separate, narrower discrepancy outside this contribution's described scope, left untouched and flagged for a future pass.

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