If you're trying to buy happiness, you'd be better off putting your money toward a tropical island get-away than a new computer, a new study suggests. The results show that people's satisfaction with their life-experience purchases — anything from seeing a movie to going on a vacation — tends to start out high and go up over time. On the other hand, although they might be initially happy with that shiny new iPhone or the latest in fashion, their satisfaction with these items wanes with time. The findings, based on eight separate studies, agree with previous research showing that experience-related...