Can money buy happiness?

Maybe just a bit, says this recent study:

In one study, they said, people with household incomes of $90,000 or more were only slightly more likely to call themselves very happy over all than were people from households making $50,000 to $89,999 “” 43 percent to 42 percent. (Members of the first group were nearly twice as likely to be “very happy” as people from households with incomes below $20,000.)