The Pareto Principle is very simple, yet very important. It is named after Italian economist Vilfredo Pareto, who, in 1906, found that 80% of the land...
Hick–Hyman Law, named after British and American psychologists William Edmund Hick and Ray Hyman. In 1951 the British psychologist William Hick conducted experiments with a series...
Thank you Melitta Staffard Broeker