adequate for practical use; especially sufficient in strength or numbers to accomplish something realistic aware or expressing awareness of things as they really are
Pre-Master Human Resources Management. The Pre-Master's Human Resources Management Program offers on-campus MBA preparation, MPA preparation, master's in marketing communications preparation, and HRM master's preparation to international students at Roosevelt University in Chicago.
Universities do offer a PhD in Business Administration. I have one in Finance, but you can concentrate in other fields, including Operations Research, Marketing, Organizational Behavior, Accounting, Business Strategy, etc. The MBA is considered a terminal degree, and is not the usual route towards getting a PhD.