  The explosion of mobile phone communications in the last years occurs at a
moment where data processing power increases exponentially. Thanks to those two
changes in a global scale, the road has been opened to use mobile phone
communications to generate inferences and characterizations of mobile phone
users. In this work, we use the communication network, enriched by a set of
users' attributes, to gain a better understanding of the demographic features
of a population. Namely, we use call detail records and banking information to
infer the income of each person in the graph.
