Over time, of course, market wages increase for reasons unrelated to minimum-wage legislation. We have seen that productivity and income levels tend to increase steadily in a free market (cf. p. 4.10:28), and to a degree such progress may be observed even in a market where some intervention is present but economic freedom still remains largely intact. In addition, inflation (discussed below) may generate rising wages as well as rising prices, creating an illusion of increasing prosperity. Some may mistakenly credit wage increases from these causes to minimum-wage laws. The real effect of such laws, however, is to create what economists call "structural unemployment"a persistent level of unemployment (over and beyond "frictional" unemployment; cf. p. 4.6:27), unresponsive in the long run to monetary or fiscal policies.
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