[1] He continued his affiliation with the Tudeh Party for some ten years, working in the press division and authoring unsigned editorials.
His dissertation on the Khorasani style in Persian poetry was published as a book and is regarded as a standard text on the subject.
In 1980 Mahjoub left Iran for Paris, giving weekly lectures on Persian folk literature at the École Pierre Brossolette.
He later moved to the United States and began teaching at the University of California, Berkeley in 1991 until his death from prostate cancer in 1996.
Mahjoub is known for his works on Iranian folk literature and language, for his scholarly editorship of several classical texts, as a translator and a consummate academic and teacher.