Spending on Happiness

http://hbswk.hbs.edu/item/5944.html
Money can't buy you love but it can buy happiness—as long as it's money for someone else. New research by HBS professor Michael I. Norton and colleagues Elizabeth W. Dunn and Lara B. Aknin, described in the journal Science, looks into how and why spending money on others promotes happiness. Norton explains more in this Q&A.