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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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Time evolution of churning users. The average number n _1w of friends churning during the week before the last login of a user plotted against the time difference to the time of the maximal user loss in case of the model and to the date February 2013 in case of iWiW. The slope of the straight line is ~1.25. The inset shows the same data with the x axis indicating the number of months after 01.2007.