Many of the enrollment management consultants have case study/white paper info on their websites. The models tend to be highly specific to a given institution.
Here is a link to how (as of 2017) Dickinson college uses predictive analytics in admissions, it’s pretty interesting in how they use a decile system to rank each app as it comes in the door. Apps are ranked on a bunch of factors many of which have been identified (via historical Dickinson data) as equating to higher yield. https://www.youtube.com/watch?v=yuevUJPXEtc