Over the following decades, the master's degree—renamed the Master of International Management (MIM) – came to dominate, while the undergraduate program was phased out (bachelors degrees ceased to be awarded by 1975). The school accordingly changed its name to the "Thunderbird Graduate School of International Management" (in 1967), and then to the "American Graduate School of International Management" (in 1973).
In the following years, the master's degree in International Management (MIM) grew in prominence while the undergraduate program was phased out by 1975 (bachelor’s degrees were no longer awarded). The school thus renamed itself to "Thunderbird Graduate School of International Management" in 1967 and later to "American Graduate School of International Management" in 1973.