Attrition at the Ph. D. lever is also thought to be a waste of precious faculty time and a drain on university resources already being used to capacity.

• 这份全面调查报告是以22000份调查表分送给以前在24所大学就读的博士生为基础的。这份全面调查报告似乎说明过去许多担心害怕是没有根据的。