The phrase "a case study of what" is correct and usable in written English.
It can be used when introducing a specific topic or subject that will be analyzed or examined in detail through a case study.
Example: "This research presents a case study of what happens when companies implement remote work policies."
Alternatives: "an analysis of what" or "a study of what".
In this paper, we provide a case study of what can go wrong and why.
Engineers working with the agency are often drilled in the failure as a case study of what can go wrong.
Germany has not, offering a case study of what happens when politicians listen to the rhetoric of the prostitution-is-work industry.
Indeed, the crisis in Puerto Rico is a case study of what happens when people with little political capital need the help of their government.
Dorothy Brizill, executive director of the watchdog group DCWatch, called the tangle of politics, money and contracting a "case study" of what was wrong with the district's government.
Many economists point to Iceland as a case study of what should be done during an economic crisis: devalue your currency, impose capital controls and avoid excessive austerity.
Pakistan's own history provides a prime case study of what happens when an ethnic group can no longer tolerate political and economic disregard.
This legislative indolence is a shocking case study of what complacent ignorance can do to a democracy, and we are now living with the consequences of it.
But for millions of people who don't know much about the issue, and only tune in when a high-profile case dominates the 24/7 news cycle for a few days, the Rice incident and its fall-out provide a powerful case study of what the cultural theorist Henry Giroux calls "public pedagogy".
When Europeans worry about the impossibility of integration of those with different cultural or religious backgrounds, Australia is a salutary case study of what is possible.
"Dahshur is just a single case study of what's happening on every archaeological site in Egypt," said Monica Hanna, who campaigns for greater resources to be allocated to Egypt's ancient sites.
