Like all (above-market) price floors, minimum-wage laws result in a surplus of the item traded. Supply and demand schedules for a particular type of labor are shown in the graph. As we know (pp. 4.8:10-18), the labor supply at any wage is determined by workers' value scales (marginal disutilities of labor), while the demand is determined by the marginal contribution of a labor unit to the final product (DMVP).

In order to have any direct effect on the market, the minimum wage must exceed the free-market wage. In the graph, an imposed $8.50 wage floor is represented by the blue horizontal line. As can be seen, the labor supply at this level exceeds the demand for labor: that is, the quantity of work sought by workers exceeds the jobs available. This excess, measured in person-hours, is known as unemployment.      Next page


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