In this article, the distribution of rare features among the world’s languages is investigated based on the data from the World Atlas of Language Structures (Haspelmath et al. 2005). A Rarity Index for a language is defined, resulting in a listing of the world’s languages by mean rarity. Further, a Group Rarity Index is defined to be able to measure average rarity of genealogical or areal groups. One of the most exceptional geographical areas turns out to be northwestern Europe. A closer investigation of the characteristics that make this area exceptional concludes this article.
如果您有任何问题，请随时与我们联系，谢谢。Chapter Quantitative explorations of the worldwide distribution of rare characteristics, or 内容均搜集于网络，本身不存储任何资源，如侵犯到您的权益，请提交反馈，我们将配合您第一时间删除。