Signaling:Suppose restaurant XYZ has two positions available, washing dishes and chopping onions.Chopping Onions is relatively more important to the restaurant so it will pay $30,000 over one's career while washing dishes pays $10,000 over one's career.The problem is you cannot train someone to be a good (G) onion chopper.In addition, whether or not someone is a bad onion chopper (B) is innate and unobservable.Even though the skill is something you are born with, the manager of XYZ decides to require Y hours of training for the Onion Chopper position, but not the dish washer.Bad Onion Choppers struggle with chopping onions and risk losing a finger and tearing up easily.As a result, they incur a disutility of chopping onions in the amount of $500 per hour of training, while Good Onion Choppers only incur a disutility in the amount of $100 per hour (note there is no disutility for actually doing the job, just during training).

What is the minimum amount of training the manager should require ?