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Pareto Principle
The Pareto Principle is also known as “the 80:20 rule” and “A minority of input produces the majority of results.” Italian economist Vilfredo Pareto studied the distribution of wealth in a variety of countries around 1900 and found that about 80% of the wealth in most countries was controlled by a consistent minority—about 20% of the people. The principle has been expanded beyond its economic use and reflects the notion that most of the results (of a life, of a program, of a financial campaign) come from a minority of effort (or people, or input).
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