Dynamic Spread of Happiness in a Large Social Network : Longitudinal Analysis Over 20 Years in the Framingham Heart Study The Harvard community has made this article openly available . Please share how this access benefits you . Your story matters . [ Pos

James, H. (2013). Dynamic Spread of Happiness in a Large Social Network : Longitudinal Analysis Over 20 Years in the Framingham Heart Study The Harvard community has made this article openly available . Please share how this access benefits you . Your story matters . [ Pos.