Interplay between Telecommunications and Face-to-Face Interactions: A Study Using Mobile Phone Data

@article{Calabrese2011InterplayBT,
  title={Interplay between Telecommunications and Face-to-Face Interactions: A Study Using Mobile Phone Data},
  author={Francesco Calabrese and Zbigniew Smoreda and Vincent D. Blondel and Carlo Ratti},
  journal={PLoS ONE},
  year={2011},
  volume={6}
}
In this study we analyze one year of anonymized telecommunications data for over one million customers from a large European cellphone operator, and we investigate the relationship between people's calls and their physical location. We discover that more than 90% of users who have called each other have also shared the same space (cell tower), even if they live far apart. Moreover, we find that close to 70% of users who call each other frequently (at least once per month on average) have shared… Expand

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