On the shoulders of students? The contribution of PhD students to the advancement of knowledge

Using the participation in peer reviewed publications of all doctoral students in Quebec over the 2000-2007 period this paper provides the first large scale analysis of their research effort. It shows that PhD students contribute to about a third of the publication output of the province, with doctoral students in the natural and medical sciences being present in a higher proportion of papers published than their colleagues of the social sciences and humanities. Collaboration is an important component of this socialization: disciplines in which student collaboration is higher are also those in which doctoral students are the most involved in peer-reviewed publications. In terms of scientific impact, papers co-signed by doctorate students obtain significantly lower citation rates than other Quebec papers, except in natural sciences and engineering. Finally, this paper shows that involving doctoral students in publications is positively linked with degree completion and ulterior career in research.

💡 Research Summary

This study provides the first large‑scale bibliometric analysis of doctoral students’ contribution to peer‑reviewed publications in Quebec between 2000 and 2007. By linking the province’s graduate enrolment database (27,393 distinct PhD candidates) with major citation indexes, the author identified every paper that listed a doctoral student as a co‑author. Overall, students were involved in roughly one‑third of all scholarly output produced in Quebec during the eight‑year window. The share varied markedly by discipline: natural sciences and medicine showed the highest student participation (around 40 % of papers), engineering was also relatively high, while the social sciences and humanities lagged at about 20 %. A strong positive correlation emerged between the degree of collaboration (average number of co‑authors per paper) and the proportion of student‑authored papers, indicating that fields with more team‑oriented research practices integrate students more fully. Citation analysis revealed that, on average, papers bearing student co‑authorship received fewer citations than other Quebec papers, but this gap disappeared in the natural sciences and engineering, suggesting that in these domains student contributions (often experimental or data‑collection work) are valued as core scientific input. Importantly, the number of publications a student co‑authored was positively linked to degree completion and to subsequent entry into research‑intensive careers. Students who published multiple papers were significantly more likely to graduate and to secure post‑doctoral or faculty positions. The study also examined funding and mentorship effects: fellowships, research assistantships, and teaching assistantships each boosted publication output, with discipline‑specific patterns (e.g., teaching assistantships mattered most in the humanities). Mentoring, especially collaborative mentoring that resulted in co‑authorship, was a robust predictor of productivity across all fields. The paper concludes with policy implications: enhancing research collaboration opportunities for doctoral students, particularly in the social sciences and humanities, and strengthening structured mentorship and funding mechanisms can improve both degree completion rates and the pipeline of future researchers. These findings offer evidence‑based guidance for university administrators and funding agencies aiming to optimize graduate education and research capacity in Quebec and comparable research systems.