SMACK-down of Evidence-Based Medicine
| Peter Klein |
As a skeptic of the evidence-based management movement (championed by Pfeffer, Sutton, et al.) I was amused by a recent spoof article in the Journal of Evaluation in Clinical Practice, “Maternal Kisses Are Not Effective in Alleviating Minor Childhood Injuries (Boo-Boos): A Randomized, Controlled, and Blinded Study,” authored by the Study of Maternal and Child Kissing (SMACK) Working Group. Maternal kisses were associated with a positive and statistically significant increase in the Toddler Discomfort Index (TDI):
Maternal kissing of boo-boos confers no benefit on children with minor traumatic injuries compared to both no intervention and sham kissing. In fact, children in the maternal kissing group were significantly more distressed at 5 minutes than were children in the no intervention group. The practice of maternal kissing of boo-boos is not supported by the evidence and we recommend a moratorium on the practice.
The actual author, Mark Tonelli, is a prominent critic of evidence-based medicine, described by the journal’s editor as a “collapsing” movement and in a recent British Journal of Medicine editorial as a “movement in crisis.” Most of the criticisms of evidence-based medicine will sound familiar to Austrian economists: overreliance on statistically significant, but clinically irrelevant, findings in large samples; failure to appreciate context and interpretation; lack of attention to underlying mechanisms rather than unexplained correlations; and a general disdain for tacit knowledge and understanding.
My guess is that evidence-based management, which is modeled after evidence-based medicine, is in for a similarly rocky ride. Teppo had some interesting orgtheory posts on this a few years ago (e.g., here and here). Evidence-based management has been criticized, as you might expect, by critical theorists and other postmodernists who don’t like the concept of “evidence” per se but the real problems are more mundane: what counts as evidence, and what conclusions can legitimately be drawn from this evidence, are far from obvious in most cases. Particularly in entrepreneurial settings, as we’ve written often on these pages, intuition, Verstehen, or judgment may be more reliable guides than quantitative, analytical reasoning.
Update: Thanks to Ivan Zupic for pointing me to a review and critique of EBM in the current issue of AMLE.