3. Figure 3-7 presents wages in the manufacturing and services sectors for the period 1973 to 2018. Is the difference in wages across sectors consistent with either Ricardian model studied in chapter 2 or the specific-factors model? Explain why or why not. Real 375 hourly wages (2018 32 dollars) Information services 27 Manufacturing 22 17 All private services 12 1973 1978 1983 1988 1993 1998 2003 2008 2013 2018 Year FIGURE 3-7 Real Hourly Earnings of Production Workers, 1973-2018 This chart shows the real wages (in constant 2018 dollars) earned by production workers in U.5. manufacturing, in all private services, and in information services (a subset of all private services). Although wages were slightly higher in manufacturing than in all private services from 1973 through 2007, all private service wages have been higher since 2008. This change is due in part to the effect of wages in the information service industry, which are substantially higher than those in manufacturing. Real wages for production workers in manufacturing have tended to fall since about 1986, whereas real wages in the service sector fell until about 1996 but have been rising since then. Real wages in Information services have been growing since about 1993