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Role of activity in human dynamics
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2008 (English)In: Europhysics letters, ISSN 0295-5075, E-ISSN 1286-4854, Vol. 82, no 2Article in journal (Refereed) Published
Abstract [en]

The human society is a very complex system; still, there are several non-trivial, features. One type of them is the presence of power-law-distributed quantities in temporal statistics. In this letter, we focus on the origin of power laws in rating of movies. We present a systematic empirical exploration of the time between two consecutive ratings of movies ( the interevent time). At an aggregate level, we find a monotonous relation between the activity of individuals and the power law exponent of the interevent time distribution. At an individual level, we observe a heavy-tailed distribution for each user, as well as a negative correlation between the activity and the width of the distribution. We support these findings by a similar data set from mobile phone text-message communication. Our results demonstrate a significant role of the activity of individuals on the society-level patterns of human behavior. We believe this is a common character in the interest-driven human dynamics, corresponding to (but different from) the universality classes of task-driven dynamics.

Place, publisher, year, edition, pages
2008. Vol. 82, no 2
Keyword [en]
waiting-times, power-law
National Category
Engineering and Technology
URN: urn:nbn:se:kth:diva-17484DOI: 10.1209/0295-5075/82/28002ISI: 000255369400023ScopusID: 2-s2.0-79051468986OAI: diva2:335528
QC 20100525Available from: 2010-08-05 Created: 2010-08-05 Last updated: 2011-04-12Bibliographically approved

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Kim, Beom JunHolme, Petter
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