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. 2017 Dec 1;7:16743. doi: 10.1038/s41598-017-17135-1

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© The Author(s) 2017

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

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Fraction of active friends at the time of last login. (a) Distribution of the fraction of active acquaintances at the time of the last login of users for four different user degrees in iWiW. Note that the absence of values less than r _end ≃ 0.3 is due to the fact that our database was truncated when 70% of the users left. (b) Same plot for the model using an extended network with N = 10⁴ agents and 〈k〉 = 220.