You know them, right? The friends you log into Facebook to check out. They always have something interesting to share and you like to see what it is. That process is one way of measuring influence in social networks and a rather good one at that, according to recent research by Michael Trusov, Anand Bodapati and Randy Bucklin. They set out to identify influencers in a social network and did so using some interesting data and analytics. Here’s the story.