CAMBRIDGE, Mass. — In a time of tight budgets and financial crisis, politicians nowadays look to economic growth as the centerpiece of their domestic policy programs. Gross domestic product is taken to be the leading indicator of national well-being. But, as we look ahead to 2011 and beyond, we should ask ourselves: Is it really wise to accord such importance to growth?

Granted, many studies have confirmed that wealthier nations tend to be happier than poor ones, and that rich people are generally more satisfied than their less affluent fellow citizens.

Yet other findings from several relatively well-to-do countries, such as South Korea and the United States, suggest that people there are essentially no happier today than they were 50 years ago, despite a doubling or quadrupling of average per capita income.