Business schools have long enticed students into their MBA programs with the promise that, after a short stint spent studying the ins and outs of the business world, they will be able to step right into the upper echelons of management or launch a business that soon has them flitting about the world in a private jet. "Sounds great," you say. "Sign me up "

Not so fast.Sure, business school might prove a necessary prerequisite for those aiming to gain employment at a large financial institution, land a job with a consultancy, or accelerate their journey tomanagerial superstardom at a...