But Christakis and Fowler say their findings show that the gamble of increased sociability pays off, for a surprising reason: Happiness is more contagious than unhappiness. According to their statistical analysis, each additional happy friend boosts your good cheer by 9 percent, while each additional unhappy friend drags you down by only 7 percent. So by this logic, adding more links to your network should — mathematically — add to your store of happiness. “If you’re at the center of a network, you are going to be more susceptible to anything that spreads through it,” Fowler said. “And if happiness is spreading more reliably, then on average you’re going to be catching happy waves more often than you catch sad waves.”