A new study claims to reveal exactly how much money provides the optimal level of joy.

A study based on surveys conducted with 450,000 Americans concluded that a salary of $75,000 a year is perfect for happiness. The researchers, Princeton economist Angus Deaton and psychologist Daniel Kahneman, also said that beyond this magical number, money is just more stuff and has no measurable improvement on people's day-to-day happiness. However, they also mentioned that making more money also boosted the life assessment of people and will make them feel that they have a better life.

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