The Annenberg Institute at Brown University offers this national working paper series to provide open access to high-quality papers from multiple disciplines on a wide variety of topics related to education. EdWorkingPapers focuses particularly on research with strong implications for education policy. EdWorkingPapers circulates papers prior to publication for comment and discussion; these papers have not gone through a peer review process. Contributors can update papers to provide readers with the most up-to-date findings.
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Using data with detailed instructor employment information from a state college system, this study examines disciplinary variations in the characteristics and effects of non-tenure-track faculty hired through temporary and long-term employment. We identify substantial differences in the demographic and employment characteristics between the two types of non-tenure-line faculty, where the differences are most pronounced in STEM fields at four-year colleges. Using an instrumental variables strategy to address student sorting, our analyses indicate that taking introductory courses with temporary adjuncts reduces subsequent interest, and the effects are particularly large in STEM fields at four-year colleges. Long-term non-tenure faculty are generally comparable to tenure-track faculty in student subsequent interest, but tenure-track faculty are associated with better subsequent performance in a handful of fields.