Chih-Chao (Jason) Chen: "Community Computing: Comparisons between Rural and Urban Societies using Mobile Phone Data"
This is the link of this paper. 
In this paper, the author present a comparative analysis of the behavioral dynamics of rural and urban societies using four years of mobile phone data from all 1.4M subscribers within a small country. The main ideas are:
- Understanding of the social interactions becomes science rather than arts.
- Comparative analysis of the behavioral dynamics of rural and urban societies.
- Utilizing mobile call data records of 1.4M mobile phone subscribers over 4 years.
- Quantify more fundamental rules of human.
- Confirm the hypothesis for behavioral adaptation, demonstrating that individuals change their patterns of communication to increase the similarity with their new social environment.
- Causality: more rigorous experiments should be designed and performed to establish causal relationships from urban environments.
- It is worthwhile to study in greater temporal detail the migration through these periods of change with their point of origin and the formation of new ones in their destination.