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  1. May 2021
    1. The volunteers who received recognition for their efforts were 20 percent more likely to volunteer for Wikipedia again in the following month and 13 percent more likely than those who earned no praise to be active on Wikipedia a year later.

      Jana Gallus, an economist studying for her doctorate at the University of Zurich ran a test on gamification of Wikipedia that showed a 20 percent jump in volunteerism over a month and 13 percent over a control for a year.