The following graph shows equilibrium in a free market, with equilibrium quantity of QE. PRICE QE QUANTITY Supply Demand For any level of output equal to QE, a buyer values a unit of goods in this market (?) the unit will cost a seller. Suppose now that a firm that produces for this market hires a private security force, reducing crime not only in their factory, but also in the small town in which it is located. This is an example of due to