Read about this in the LA Times article about the original study that is in the current issue (Dec 4, 2008) of the British Medical Journal. It's fascinating that electronic contact (phone, web) doesn't spread the love the way that old fashioned face time does. Here's an excerpt from the LA Times:
Similarly, happy siblings make you 14% more likely to be happy yourself, but only if they live within one mile. Happy spouses provide an 8% boost -- if they live under the same roof. Next-door neighbors who are happy make you 34% more likely to be happy too, but no other neighbors have an effect, even if they live on the same block.
"We suspect emotions spread through frequency of contact," Fowler said. As a result, he said, people who live too far away to be seen on a regular basis don't have much effect.
You might also enjoy the commentary in the British Medical Journal on social network analysis. You can also read the editorial that goes along with both. So interesting, not so surprising.



