Which comes first, happiness or money? Are richer people1? And 2how do people get richer? A recent study could tell you the answer.

    The study3thousands of teenagers and found that those who felt better about4as young adults 5 to have higher incomes by the time they 629. Those who were happiest earned an average of $8,000 more than those who were the most7.

    The researchers, from University College London and the University of Warwick, say that very gloomy（沮丧的）teens, no matter how tall or smart they were, earned 10% less than their peers8the happier ones earned 930% more.

    Happier teenagers have an easier time 10school, college and the job 11,12 because they always feel better about life. It may13 be true that happier people find it easier to make friends, who are often the key to homework help or networking.

    A report in June suggested that professional respect was more important than14in terms of workplace happiness. In August scientists announced that they had found the 15for happiness in women. Alas! The same gene doesn't appear to have16effect on men. And in October researchers in the UK and in the US announced that people who eat seven portions of fruit and vegetables a day report being the happiest.

    If it is really true that happier kids17being wealthier kids, is it necessary for parents to get their kids to do the homework? The fact is that 18 homework will make kids happy but surely hurt their grades. Studies do show19 that more education20better-paid jobs, which may give us a deep thought.