The average happiness of parents and entrepreneurs might be lower, but the depth of emotion is greater: the lows are lower but the highs are so much higher.

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Americans, though, buck the conventional wisdom that average levels of happiness do not increase as a society gets richer.

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These numbers were combined to find an average rating of overall employee happiness for each company.

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The numbers were combined to find an average rating of overall employee happiness for each respondent, and then sorted by job title to find which occupations had the unhappiest workers.

FORBES: The Unhappiest Jobs In America

The numbers were combined to find an average rating of overall employee happiness for each respondent, and then sorted by job title to find which occupations had the happiest workers.

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The result: Levels of oxytocin, a feel-good hormone linked to love and happiness, were an average 38% higher for people who got a coupon.

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The findings were clear: newlyweds enjoy a big happiness boost that lasts, on average, for just two years.

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That result sits comfortably with other studies showing that, on average, Asian countries report lower levels of happiness than their GDP per head would suggest.

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When researchers in Germany did the math, they found that the average worker would need their income to go up by a third just to offset the happiness cost of tacking on a 20-minute commute.

CNN: Use your money to buy happier time