sentences:  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 (and 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).The American Management Association entered into some sort of relationship with the school, while the North Central Association granted Thunderbird regional accreditation in 1969 and 1974.