Many academic positions are advertised for PhD students. Does it make sense to apply for such a position even if you already have a PhD, in the hope that they might also consider a post-doc instead? Why would the hiring institution not want a post-doc instead of a PhD student? Why would a prospective post-doc not want such a position?
In case somebody wonders why I'm asking:
- Often, there are many more projects advertised for prospective PhD students than for prospective post-docs.
- Many of the projects seem to be scientifically challenging enough to be interesting also for a post-doc, especially if one is switching fields or completing the project in a shorter time frame.
- I cannot see why institutions would be opposed to hiring post-docs instead of PhD students, considering the much higher qualification they bring. I can imagine that there are some limitations attached to funding, though.
For context, I am in an engineering / computer science field in Europe, where PhD and post-doc positions offer comparable salaries.