“Key indicators require some specified time span during which they are to be tabulated for purposes of reward or penalty. The time span can vary enormously according to the process and the indicator.”

— Thomas Sowell

Source: 1980s–1990s, Knowledge and Decisions (1980; 1996), Ch. 1 : The Role of Knowledge

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Thomas Sowell 101

American economist, social theorist, political philosopher … 1930

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“Key indicators require some specified time span during which they are to be tabulated for purposes of reward or penalty. The time span can vary enormously according to the process and the indicator.”

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Thomas Sowell 101

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