<p>I don’t think there’s anything technically wrong with BS/PhD from same school. I think the point is that, if you do you’re BS/PhD at a institution, don’t expect a job there (minus MIT). :)</p>
<p>I never really saw this as a problem in engineering because most of the graduates move onto industry (where the $$ is at). Industry, as far as I know, hire based upon your demonstration of intellectual capacity, not how often you relocate every 4 years. I can’t say the same about the arts/social sciences due to the fact that they are highly academia-based fields. Academia, as stated above, tends to delegate a not so inbred faculty pool with efforts to maintain diversity in ideas. </p>
<p>Unless you’re in California weather and would hate to lose it (and/or engaged), I’d probably say start fresh somewhere else for your own benefit.</p>
<p>As a side note, I don’t really see a huge problem with a person doing a BS in say chemical engineering and moving into fields of biomedical engineering and material science engineering at the same institution (as long as they like it and are a good fit). You are simultaneously broadening your intellectual horizons and your professional connections with new department professors.</p>