Market Design of College-Major Switches for Reducing Student-Major Mismatch, Umut Dur, Yi-Cheng Kao, and Scott Paiement, working paper presented at the 2024 ASSA meetings, right here: https://www.aeaweb.org/conference/2024/program/paper/rdZaYfd2.
This paper looks at major-switching in a Taiwanese university, which is done differently than the (generally) decentralized process used in most U.S. universities. The institutional setup is more complex, which motivates the procedure these authors develop to improve the matching process and allow more students to enroll in (switch to) their most-desired major. In the later sections of the paper, 6.4 and 6.5, we learn that the university in question adopted their procedure, but it didn't work as intended! It had essentially a null effect. It's a great paper for learning about the importance of vernacular knowledge.
An important fact mentioned in the Q&A at this paper's presentation was that no additional resources attended an increase in majors. Thus, a faculty that accepted more majors would be increasing its own workload.