Money Can't Buy Happiness. Yes It Can.
From Germany's Institute for the Study of Labor:
"One of the famous questions in social science is whether money makes people happy. We offer new evidence by using longitudinal data on a random sample of Britons who receive medium-sized lottery wins of between £1000 and £120,000 (that is, up to approximately U.S. $200,000). When compared to two control groups one with no wins and the other with small wins these individuals go on eventually to exhibit significantly better psychological health.