Christakis and Fowler : So a natural question to ask was whether the same clusters of overweight individuals exist online and , if so , under what circumstances . During holidays , feast and Facebook go hand - in - hand . Authors ' study found weight gain is spread via real - life social networks . Writers on Facebook and other online networks mimic those in real world . Study of ` ` ' ' '' on Facebook found same clustering of overweight pals .
Christakis and Fowler : During holidays , feast and Facebook go hand - in - hand . Authors ' study found weight gain is spread via real - life social networks . Writers on Facebook and other online networks mimic those in real world . Study of ` ` ' ' '' on Facebook found same clustering of overweight pals .