
TL;DR
This paper investigates the growth patterns of online tagging systems, providing evidence for nonlinear, accelerating growth driven by individual activity heterogeneity, which has implications for understanding web dynamics.
Contribution
It introduces the concept of accelerating growth in online tagging systems and demonstrates its relation to individual activity heterogeneity, supported by empirical data.
Findings
Power law relationship between new tags and population (F ~ P^γ, γ > 1)
Evidence supporting nonlinear, accelerating growth in tagging systems
Greater activity heterogeneity leads to faster growth
Abstract
Research on the growth of online tagging systems not only is interesting in its own right, but also yields insights for website management and semantic web analysis. Traditional models that describing the growth of online systems can be divided between linear and nonlinear versions. Linear models, including the BA model (Brabasi and Albert, 1999), assume that the average activity of users is a constant independent of population. Hence the total activity is a linear function of population. On the contrary, nonlinear models suggest that the average activity is affected by the size of the population and the total activity is a nonlinear function of population. In the current study, supporting evidences for the nonlinear growth assumption are obtained from data on Internet users' tagging behavior. A power law relationship between the number of new tags (F) and the population (P), which can…
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