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What Is the Marginal Product of a Factor of Production?
The median income of a child care worker in the United States right now, as we speak, is $11.22 an hour median. By any measure that I know of that makes any rational sense, to give that a lower salary than you give the guy who watches your car. The car park people are males and the child care people are females. You can't just remove a worker and have a clean mathematical calculation of the effect that it has on the output. That's not possible. And you cannot assume much as you want to that the outcome on the output side is uniquely determined by the change you made on the input side. Even in the average, it's not going to work