This article (Clauset, Arbesman, and Larremore. “Systematic inequality and hierarchy in faculty hiring networks”) has been making the rounds lately. The article uses a network method to extract prestige rankings from the set of graduate degrees and faculty hires. It shows “that faculty hiring follows a common and steeply hierarchical structure that reflects profound social inequality.”
Blog posts, tweets, and stories about the article (e.g., this one from the Monkey Cage) have mostly picked up on the idea that the fact that prestigious departments generally hire Ph.D.s from other prestigious departments must mean that “academia is not a meritocracy.” While I would certainly not claim that academia is a meritocracy, I don’t think the Clauset et al. paper demonstrates that.