Recent research (BMJ 2008) has examined whether happiness can be spread from person to person, and how would the structures social networks can affect happiness. Using a longitudinal social network analysis, the study has followed a total of 4739 participants from year 1983 to the year 2003. By measuring the broad array of attributes of social networks and verse social ties, researchers found significant increased of happiness visible in the network, particular in friends living close by, between co-resident spouses, siblings who live nearby, and next door neighbors. No significant resulted in coworkers, and the effect of happiness does fade through times and with distance. The research has shown the dependency of people’s happiness to
