We document a causal influence of online user-generated information on realworld economic outcomes. In particular, we conduct a randomized field experiment to test whether additional information on Wikipedia about cities affects tourists’ choices of overnight visits. Our treatment of adding information to Wikipedia increases overnight visits by 9% during the tourist season. The impact comes mostly from improving the shorter and incomplete pages in Wikipedia.
Hinnosaar, Marit, Toomas Hinnosaar, Michael Kummer und Olga Slivkó (2015), Does Wikipedia Matter? The Effect of Wikipedia on Tourist Choices, ZEW Discussion Paper Nr. 15-089, Mannheim.