A public school currently it pays all teachers the same, regardless of their area of expertise. At $70,000, it hires good teachers in all areas except science. Because science is a field in demand, the school can only hire poor science teachers. It would have to pay science teachers $90,000 to hire good science teachers. If one out of five teachers is a science teacher, what is the marginal expense of getting a good science teacher instead of a poor one?

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The Answer of A public school currently it pays all teachers the same, regardless of their area of expertise. At $70,000, it hires good teachers in all areas except science. Because science is a field in demand, the school can only hire poor science teachers. It would have to pay science teachers $90,000 to hire good science teachers. If one out of five teachers is a science teacher, what is the marginal expense of getting a good science teacher instead of a poor one?

A Public School Currently It Pays All Teachers the Same