2. Research by Panciera et al. may be the closest study on this question. They discuss the lifecycle of Wikipedia editors, including how editors of all levels decrease their participation over time. Panciera et al., supra note 59; accord Rodrigo B. Almeida et al., “On the Evolution of Wikipedia,” Int’l Conf. on Weblogs & Soc. Media 1, 5 (2007), http://oak.cs.ucla.edu/~cho/papers/almeida-icwsm07.pdf (“[W]hen looking at the whole group of our users together, we can conclude that their average productivity is decreasing overall…”).