It also remains the case that MBAs are valued by many employers. GMAC’s 2010 Corporate Recruiters Survey, for example, concludes that “according to the survey responses, an MBA is the ‘gold standard’ and ‘guarantee of quality’ as well as a company’s ‘long-term investment’ ”. The GMAC used Dierdorff and Rubin’s model of managerial competencies (18 factors) to ask employers how they would rate the performance of their MBAs compared to their employees without MBAs in the same roles. The majority of employers reported that their MBAs demonstrated higher or much higher ability in respect of the following competencies: