December 29, 2011
"researchers discovered money is indeed a major factor in day-to-day happiness. No surprise there. You need to make a certain amount, on average, to be able to afford food, shelter, clothing, entertainment and the occasional Apple product, but what spun top hats around the country was their finding that beyond a certain point your happiness levels off. The happiness money offers doesn’t keep getting more and more potent – it plateaus. The research showed that a lack of money brings unhappiness, but an overabundance does not have the opposite effect."

The Overjustification Effect « You Are Not So Smart