Charles GoodhartMonetary policy paper, 1975
Any observed statistical regularity collapses once pressure is placed on it for control purposes — targets change the behaviour they measure.
Marilyn StrathernAudit culture critique, 1997
The popular formulation: when a measure becomes a target, it ceases to be a good measure.
The EclipseFrontiers® LensChase the metric and the metric starts lying.