Goodhart’s law – Wikipedia
From Wikipedia, the free encyclopedia Charles Goodhart, for whom the adage is named, delivering a speech in 2012Goodhart’s law is an adage often stated as, “When a measure becomes a target, it ceases to be a good measure”.[1] It is named after British economist Charles Goodhart, who is credited with expressing the core idea of the adage in a 1975 article on monetary policy in the United…