Any observed statistical regularity will tend to collapse once pressure is placed upon it for control purposes. (Goodheart 1975).
A risk model breaks down when used for regulatory purposes. (Danielsson, 2002).
All metrics of scientific evaluation are bound to be abused. Goodhart’s law (named after the British economist who may have been the first to announce it) states that when a feature of the economy is picked as an indicator of the economy, then it inexorably ceases to function as that indicator because people start to game it. (Biagioli, 2016).
'Goodhart’s Law is most succinct: “When a measure becomes a target, it ceases to be a good measure.”
Campbell’s Law is the most explicit: “The more any quantitative social indicator is used for social decision-making, the more subject it will be to corruption pressures and the more apt it will be to distort and corrupt the social processes it is intended to monitor.”' (c)
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