The Goodharts law as explained for the “citations”
As applied in economics, the law is implicit in the economic idea of rational expectations, a theory in economics that states that entities who are aware of a system of rewards and punishments will optimize their actions within said system to achieve their desired results. E.g. employees whose performance in a company is measured by some known quantitative measure (cars sold in a month etc.) will attempt to optimize regarding that measure regardless of whether their behaviour is profit-maximizing. While it originated in the context of market responses, the law has profound implications for the selection of high-level targets in organizations Jón Danı́elsson quotes the law as “Any statistical relationship will break down when used for policy purposes” and suggests a corollary to the law for use in financial risk modelling: “A risk model breaks down when used for regulatory purposes.” Mario Biagioli has related the concept to consequences of using citation impact measures to estimate the importance of scientific publicationsGoodharts law – Wikipedia
We really need to rethink the rule over the citations index.