<p>If I were hiring in my (humanities) department and saw a CV from a candidate with a bachelors degree and a doctorate from the same institution, I would conclude that the candidate was both ill-advised and narrowly trained. (And perhaps couldn’t get into any other PhD programs.)</p>
<p>However, if a candidate did a bachelors and a masters at the same institution, and went elsewhere for the PhD, I would (and have) evaluate(d) them in a much more positive light. </p>
<p>As a side note, I’ve been an academic for many years, and have neven seen an example of the former in either candidates or colleagues, while I certainly have come across the latter.</p>