Different patterns of social closeness observed in mobile phone communication
Mikaela Irene D. Fudolig, Daniel Monsivais, Kunal Bhattacharya,, Hang-Hyun Jo, and Kimmo Kaski

TL;DR
This study analyzes mobile phone communication patterns to understand social closeness, revealing distinct calling behaviors among different demographic and relational groups, especially highlighting the significance of contact ranking.
Contribution
It introduces the importance of contact ranking in call frequency analysis and provides insights into how demographic factors influence communication patterns.
Findings
Mutually top-ranked opposite-gender pairs have the highest call frequency and regularity.
Older pairs tend to call less frequently and less regularly than younger pairs.
Call durations show complex dependence on age.
Abstract
We analyze a large-scale mobile phone call dataset containing information on the age, gender, and billing locality of users to get insight into social closeness in pairs of individuals of similar age. We show that in addition to using the demographic information, the ranking of contacts by their call frequency in egocentric networks is crucial to characterize the different communication patterns. We find that mutually top-ranked opposite-gender pairs show the highest levels of call frequency and daily regularity, which is consistent with the behavior of real-life romantic partners. At somewhat lower level of call frequency and daily regularity come the mutually top-ranked same-gender pairs, while the lowest call frequency and daily regularity are observed for mutually non-top-ranked pairs. We have also observed that older pairs tend to call less frequently and less regularly than…
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