Ah. It appears to be nothing more complicated than computing this linear formula given, and Facebook has a thousand tiny little knobs for adjusting the paramete

Ah. It appears to be nothing more complicated than computing this linear formula given, and Facebook has a thousand tiny little knobs for adjusting the parameters. Maybe the problem is that their algorithm is not really an algorithm. PageRank was good because it had an interpretation as a random walk that made sense (before SEO). EdgeRank can only be interpreted as an arbitrary formula.