%0 Journal Article
%T Urban Gravity: a Model for Intercity Telecommunication Flows
%A G. Krings
%A F. Calabrese
%A C. Ratti
%A V. D. Blondel
%J Physics
%D 2009
%I arXiv
%R 10.1088/1742-5468/2009/07/L07003
%X We analyze the anonymous communication patterns of 2.5 million customers of a Belgian mobile phone operator. Grouping customers by billing address, we build a social network of cities, that consists of communications between 571 cities in Belgium. We show that inter-city communication intensity is characterized by a gravity model: the communication intensity between two cities is proportional to the product of their sizes divided by the square of their distance.
%U http://arxiv.org/abs/0905.0692v2