We examine 558 hospital mergers during a period of increased antitrust enforcement. Using US data on commercially insured patients from 2009-2016, we estimate an average price effect of roughly 5% with a smaller effect for mergers later in the sample. Mergers between hospitals that were...

This paper analyzes the accuracy of various prospective hospital merger screening methods used by antitrust agencies and the courts. The qualitative and quantitative predictions of the screening methods calculated with pre-merger data are compared with the actual post-merger price changes of 26...