W ho hasn’t spent sleepless nights pondering what would happen if we applied Vilfredo Pareto's (the early 20th-century Italian economist) theories to Mario, the Mushroom Kingdom’s Italian high ...

The Pareto Principle, or 80/20 rule, asserts that 80% of outcomes stem from 20% of causes. Introduced by Italian economist Vilfredo Pareto, who noted that 80% of Italy's land was owned by 20% of the ...