* Our analysis demonstrates low variance inflation factors indicating that multicollinearity is not a problem, meaning our variables do not overly influence each other.
* We also find that range restriction mostly affects GRE-Q slightly, and we provide evidence that our published models perform as well as or better than other alternative models.
This study aims to understand the effectiveness of typical admissions criteria in identifying students who will complete the Physics Ph.D. Multivariate statistical analysis of roughly one in eight physics Ph.