That's not correct. In the agency model the publishers set the price that Amazon (and others) sells it to the end user. Apple doesn't use the agency model for

That's not correct. In the agency model the publishers set the price that Amazon (and others) sells it to the end user. Apple doesn't use the agency model for music because they are dominant in that market. The agency model was meant to prevent Apple from having to compete with Amazon on price. They couldn't sell at the same price as Amazon without taking a loss.