What is the Goodhart Economics Principle?

The Goodhart Principle, and related

[By staff reporters]

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Goodhart’s law is a sociological analogue of Heisenberg’s uncertainty principle in quantum mechanics. Measuring a system usually disturbs it. The more precise the measurement, and the shorter its timescale, the greater the energy of the disturbance and the greater the unpredictability of the outcome.
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CAMPBELL’S LAW:
“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.”