50% Attrition from Graduate School....

The Original and follow-up studies can be found at the Council for Graduate Studies Webpage for their PhD Completion project: http://cgsnet.org/node/332

A convenient powerpoint breakdown of the 2007 results (apparently published in 2008) can be found here: http://www.phdcompletion.org/resources/cgsnsf2008_sowell.pdf

Some oft-cited articles describing the study and discussing its indications are here: https://www.noodle.com/articles/how-many-people-actually-finish-grad-school    and https://www.chronicle.com/article/PhD-Attrition-How-Much-Is/140045

Thanks for coming to the page!  @ph_d_epression