US Tenured Scientists Produce Less Impactful Work, Study Reveals

A recent study examining the research output of over 12,000 academics across 15 disciplines reveals that scientists in the United States who achieve tenure tend to produce work that is more novel but less impactful. Conducted by a team of data scientists led by Giorgio Tripodi from Northwestern University, the analysis tracked the publication history of academics five years before and five years after they receive tenure.

The findings indicate a significant shift in publication patterns related to tenure status. Researchers typically experience a steep rise in publication rates during their tenure-track period, which peaks in the year prior to securing a permanent position. After obtaining tenure, their publication rates stabilize near this peak level. This trend is consistent across various disciplines, suggesting a reproducible pattern in academic output.

Tripodi elaborates on the implications of this tenure structure, stating, “Tenure in the US academic system is a very peculiar contract. It features a relatively long probation period followed by a permanent appointment, which is a strong incentive to maximize research output and avoid projects that are more likely to fail during the tenure track.”

In terms of post-tenure performance, the study highlights a noticeable decline in research output for academics in non-lab-based fields, including mathematics, business, economics, sociology, and political science. Conversely, researchers in lab-based disciplines such as physics maintain their publication rates at levels similar to their pre-tenure peaks. Tripodi notes the reasons behind this disparity, saying, “In lab-based fields, collaborative teams and sustained funding streams may help maintain high productivity post-tenure.”

The study also assessed the quality of published work by analyzing the proportion of high-impact papers, defined as those in the top 5% of a field. The results indicate that researchers across all 15 disciplines tend to publish a higher number of high-impact papers before achieving tenure compared to their output afterward. Furthermore, while the novelty of research—characterized by atypical combinations of work—shows an increasing trend over time, the most innovative papers are typically published post-tenure.

Tripodi suggests that once job security is attained, the pressure to publish shifts focus, allowing scientists to pursue riskier and more novel research directions. “Our results show that tenure allows scientists to take more risks, explore novel research directions, and reorganize their research portfolio,” he explains.

As the landscape of academic research continues to evolve, these findings underscore the complex relationship between tenure and research productivity. Understanding these dynamics can provide valuable insights for academic institutions and policymakers aiming to foster innovation and impactful research in various fields.