Yale University President Richard C. Levin announced Thursday he is stepping down at the end of the academic year, after 20 years as the head of the Ivy League school.
Levin, 65, has served longer than any other president currently in the Ivy League or the 61-member Association of American Universities. He joined the faculty in 1974 and became president of the school in 1993.
Levin plans to take a sabbatical and write a book. In a message to the Yale community, Levin said that he looks forward to his year off, "when at last I will have the time to complete a book of reflections on higher education and economic policy."
During his time at Yale, Levin oversaw the school's largest building and renovation program since the 1930s, expanding Yale's international activities, sought to improve the university's historically difficult relationship with its unions and built partnerships with the city of New Haven.
"Rick Levin is simply one of the world's great leaders," Yale trustee Indra Nooyi, chief executive of PepsiCo, said in a statement. "He has been transformational in envisioning how a university should be a leading citizen in its home community and he has boldly staked out how the leading universities should become global institutions. His example has been a guide for how universities around the world can have a much greater impact."
Yale Corp., the university's governing body, will conduct a search for a new president.