Academia is a pyramid, like most organizations, eventually most PhDs cannot get a full time position.
The fact that many PhDs leave is..normal..if you get few high impact publications you can find full time positions outside US, even as an associate professor and not just a researcher.
And the reason why many go to universities around the world for PhDs is not because they want to stay in that place necessarily but because you're more likely to fund your PhD research and get a high impact publication.
The fact that many PhDs leave is..normal..if you get few high impact publications you can find full time positions outside US, even as an associate professor and not just a researcher.
And the reason why many go to universities around the world for PhDs is not because they want to stay in that place necessarily but because you're more likely to fund your PhD research and get a high impact publication.