how to create an index of familiarity what is a familiarity graph in trading who is the only middleman in cluster 1 why do middlemen need data how to find familiarity between two traders what is the familiarity index for t2 what is familiarity graph theory why use unfamiliarity index what is familiarity index in a barter market what is familiarity index how to find familiarity between bartering traders is t2 a middleman? why do we need a matrix to create the familiarity index who makes up the middlemen of a barter matrix why is familiarity index important for market research why would a familiarity index be used as a middleman what is the cluster of familiarity what type of dataset does a symmetric n-by-n matrix of trade frequency contain? what is the familiarity cluster in graph theory what type of dataset is barter