“Many of us believe that if we only had more money, we would be happier. Yet--excluding those who live below the poverty line and cannot meet their basic needs for food, shleter, safety, or medical care--greater wealth generally does not lead to substantially greater well-being. One explanation for why more money does not bring lasting happiness is that people become accustomed to their higher standard of living and desire even more money to maintain their happiness. In addition, when people become wealthier, they tend to compare themselves to other wealthy people, rather than to their peers at their previous income levels.”