How much money do people need to be happy?

Take three people. All are unmarried, 33-year-old women who live in the United States. One makes an annual salary of $40,000, another makes $120,000, and the third makes $200,000. Who do you think is the happiest? According to a recently released study (paywall) in the burgeoning field of happiness research, the two higher-earning women are […]