Common
Campbell's law
Adage about perverse incentives
Campbell's law
Campbell's law is an adage developed by American psychologist and social scientist Donald T. Campbell, who often wrote about research methodology. The adage states: 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.
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