(From npr.org)

December 5, 2008 · Turns out, misery may not love company — but happiness does, research suggests.

A new study by researchers at Harvard University and the University of California, San Diego documents how happiness spreads through social networks.

They found that when a person becomes happy, a friend living close by has a 25 percent higher chance of becoming happy themselves. A spouse experiences an 8 percent increased chance and for next-door neighbors, it’s 34 percent.
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