An MBA isn't just a study in one thing, it's a multi-disciplinary degree. You take classes in accounting, economics, entrepreneurship, finance, international bu

An MBA isn't just a study in one thing, it's a multi-disciplinary degree. You take classes in accounting, economics, entrepreneurship, finance, international business, operations management, organizational behavior, marketing, strategy, etc. You can learn a lot on the job, but how many jobs let you do accounting and marketing? If you're working for a domestic company do you get any experience in international business? If you work in HR are you doing anything involving economics. It's easy to say you can learn anything on the job, but that's hardly the case when your job has specific responsibilities. A student who truly STUDIES and EARNS their MBA has the ability to apply a broad set of knowledge to any job. What's the basis for questioning someone's ability as an effective manager because of their degree type? Not all MBAs are managers, that's something different entirely. Then in your "real world evidence" you're questioning the efficacy of MBA graduates based on how foreign companies train from within? Huh? By itself, any degree means nothing - it's up to the employee to apply the knowledge they gained while earning that degree to bring value to their company. Questioning if there's value in an MBA in any company is questioning the value of knowledge. If there's no value in knowledge, then why bother having any sort of degree - just hire kids of a working age and teach them to put the widget together. They'll learn the rest on the job right? Hardly.