More than a year has passed since the resignation of Jorge Domínguez, a Harvard government professor who was accused of sexually harassing more than a dozen female students and junior faculty members over decades.

But his case has continued to prompt soul-searching and angry questions from students about a university culture that allowed him to stay employed and even get promoted, despite repeated complaints about his behavior.

Now a committee formed by the government department has joined a growing number of students and faculty members calling for an external review of Harvard’s response to complaints against Dr. Domínguez. The committee issued a 52-page report detailing recommended changes — including hiring more female professors and creating an anonymous reporting system for harassment — to ensure that such a case does not happen again.

“Generations of students warned one another about Domínguez’s behavior and developed coping strategies for interactions with him,” the committee wrote in a letter delivered on Wednesday to the university president, Lawrence Bacow. “Some students changed the focus of their research — at great cost — in order to avoid such interactions. This deplorable situation went on for more than 20 years.”