A fascinating example of the economic influence of #wikipedia.
"Our treatment added text and photos to the Wikipedia pages of Spanish cities in different language editions of Wikipedia. Most of the added text was translated from Spanish Wikipedia. We focused on information that was relevant to tourists, such as the city’s main sights and culture. We focused our attention on cities with rather short Wikipedia pages. The randomization was done across city and language pairs. By varying the information in different language editions of Wikipedia, we can isolate the causal impact on tourists’ choices. We find that information on Wikipedia has a sizable impact on consumption choices.
Our estimates show that adding about 2,000 characters (approximately two paragraphs) of text and one photo to a city’s Wikipedia page increased the number of nights spent in this city by about 9% during the tourist season compared to cities in the control group. The effect comes mostly from pages that were initially relatively incomplete. In particular, the treatment increases hotel stays by about 33% in cities which initially had very short pages in a particular language, while there was no effect on city-language combinations where the pages were well developed."
Also, almost all the editors' contributions to Dutch Wikipedia were immediately removed, whereas contributions to the German, French, and Italian Wikipedias persisted. I wonder what Dutch-speaking Wikipedians have against small Spanish towns?!
