English Wikivoyage is looking to experiment with a change that replaces missing articles with a link to a corresponding Wikipedia article. They are worried that the change might reduce the article creation rate -- especially from anonymous editors.
We'll be performing a natural experiment where the change will be live for a period of time. We'll be measuring differences in the article creation rate around this time.
The change was deployed in this edit: https://en.wikivoyage.org/w/index.php?diff=3761774