Abstract
Selection mechanism is an important but underexplored dimension of contest designs. We compare two popular selection mechanisms, expert rating and crowd voting, in crowdsourcing contests for creative works. Using a unique panel that has expert rating and crowd voting in the same contest, we systematically compare the two selection mechanisms in terms of winner determination and their effects on participation. We find that expert rating and crowd voting are quite different. Crowd voting strongly favors contestants who submit early and have high levels of social engagement, but expert rating does not. Past performance under one selection mechanism predicts future success under the same selection mechanism, but not the other. Expert rating and crowd voting also differ in their effects on participation: crowd voting is relatively more attractive when contestants have little experience and when they have performed well in crowd-voted prizes, and the overall participation increases with the ratio of crowd-voted prizes.
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