Rebecca Henderson and colleagues at Harvard Business School have published an unusually thorough, 32-page case in February 2018 called, "Aetna and the Transformation of Health Care." It's available for a few dollars here. For example, the authors frame a dilemma the CEO faces:
"Bertolini wondered whether Aetna needed partners to make this strategy work. Should it partner with a firm like Google, Amazon, or Uber—entities that understood digital platforms and had strong consumer brands? Should Aetna double down on its investment in local communities by exploring a relationship with a company that had a major retail presence, such as Walmart, CVS, or Walgreens, or by expanding collaborative relationships with local providers?"The case provides background on the CVS-Aetna acquisition that is currently working through the legal channels (e.g. here).
Other interesting Harvard cases recently include the crash and fix of Healthcare.gov (podcast here, case study here) and a case study on precision medicine and the business strategies of cooperative networks for adaptive and basket trials, here.