One interesting area of study is the modeling of its growth.
If Wikipedia's growth follows the exponential growth model the average rate of growth would be proportional to the size of the Wikipedia. However, it appears that the rate of growth is slowing Maybe Wikipedia's growth follows the logistic growth model better. This model is based on:
- more content leads to more traffic, which in turn leads to more new content
- however, more content also leads to less potential content, and hence less new content
- the limit is the combined expertise of the possible participants.