Immigration’s Impact on Overall Wage Rates
Immigration is popularly thought to lower the overall wage rate in the United States by increasing the supply of individuals looking for jobs. This effect may occur in an area over a fairly short period of time. Over longer time periods, however, wages will only fall if the amounts of other resources don’t change. Wages will not fall if the immigrants bring sufficient amounts of other resources with them, such as capital, or cause the amount of other resources in the economy to increase sufficiently. For example, historically the large-scale immigration from Europe contributed to rapid westward expansion of the United States during most of the nineteenth century. The westward expansion, however, increased the amounts of land and natural resources that were available, factors that almost certainly kept immigration from lowering wage rates. Immigrants also increase the amounts of other resources in the economy through running their own businesses, which both historically and in recent times has occurred at a greater rate among immigrants than native workers. By the beginning of the twentieth century, the westward frontier had been settled. A number of researchers have estimated that immigration did lower wages at this time (Hatton and Williamson, 1998; Goldin, 1994), though others have criticized these findings (Carter and Sutch, 1999). For the recent time period, most studies have found little effect of immigration on the level of wages, though a few have found an effect (Borjas, 1999).
Even if immigration leads to a fall in the wage rate, it does not follow that individual workers are worse off. Workers typically receive income from sources other than their own labor. If wages fall, then many other resource prices in the economy rise. For example, immigration increases the demand for housing and land and existing owners benefit from an increase in the current value of their property. Whether any individual worker is better off or worse off in this case is not easy to determine. It depends on the amounts of other resources each individual possesses.
Immigration’s Impact on Wages of Unskilled Workers
Consider the second issue, the effects of immigration on the wages of unskilled workers. If the immigrants arriving in the country are primarily unskilled, then the larger number of unskilled workers could cause their wage to fall if the overall demand for these workers doesn’t change. A requirement for this effect to occur is that the immigrants be less skilled than the U.S. labor force they enter. As discussed above, during colonial times immigrant volume was small and the immigrants were probably more skilled than the existing U.S. labor force. During the 1830s and 1840s, the volume and rate of immigration increased substantially and the skill level of the immigrant stream fell to approximately match that of the native labor force. Instead of lowering the wages of unskilled workers relative to those of skilled workers, however, the large inflow apparently led to little change in the wages of unskilled workers, while some skilled workers lost and others gained. The explanation for these results is that the larger number of unskilled workers resulting from immigration was a factor in employers adopting new methods of production that used more unskilled labor. As a result of this technological change, the demand for unskilled workers increased so their wage did not decline. As employers adopted these new machines, however, skilled artisans who had previously done many of these jobs, such as iron casting, suffered losses. Other skilled workers, such as many white-collar workers who were not in direct competition with the immigrants, gained. Some evidence exists to support a differential effect on skilled workers during the antebellum period (Williamson and Lindert, 1980; Margo, 2000). After the Civil War, however, the skill level of the immigrant stream was close to that of the native labor force, so immigration probably did not further affect the wage structure through the 1920s (Carter and Sutch, 1999).
Impact since World War II
The lower volume of immigration in the period from 1930 through 1960 meant immigration had little effect on the relative wages of different workers during these years. With the resumption of higher volumes of immigration after 1965, however, and with the immigrants’ skill levels being low, an effect on relative wages again became possible. In fact, the relative wages of high-school dropouts in the United States deteriorated during the same period, especially after the mid-1970s. Researchers who have studied the question have concluded that immigration accounted for about one-fourth of the wage deterioration experienced by high-school dropouts during the 1980s, though some researchers find a lower effect and others a higher one (Friedberg and Hunt, 1995; Borjas, 1999). Wages are determined by a number of factors other than immigration. In this case, it is thought the changing nature of the economy, such as the widespread use of computers increasing the benefits to education, bears more of the blame for the decline in the relative wages of high-school dropouts.
Economic Benefits from Immigration
Beyond any effect on wages, there are a number of ways in which immigration might improve the overall standard of living in an economy. First, immigrants may engage in inventive or scientific activity, with the result being a gain to everyone. Evidence exists for both the historical and more recent periods that the United States has attracted individuals with an inventive/scientific nature. The United States has always been a leader in these areas. Individuals are more likely to be successful in such an environment than in one where these activities are not as highly valued. Second, immigrants expand the size of markets for various goods, which may lead to lower firms’ average costs due to an increase in firm size. The result would be a decrease in the price of the goods in question. Third, most individuals immigrate between the ages of 15 and 35, so the expenses of their basic schooling are paid abroad. In the past, most immigrants, being of working age, immediately got a job. Thus, immigration increased the percentage of the population in the United States that worked, a factor that raises the average standard of living in a country. Even in more recent times, most immigrants work, though the increased proportion of older individuals in the immigrant stream means the positive effects from this factor may be lower than in the past. Fourth, while immigrants may place a strain on government services in an area, such as the school system, they also pay taxes. Even illegal immigrants directly pay sales taxes on their purchases of goods and indirectly pay property taxes through their rent. Finally, the fact that immigrants are less likely to immigrate to the United States during periods of high unemployment is also beneficial. By reducing the number of people looking for jobs during these periods, this factor increases the likelihood U.S. citizens will be able to find a job.
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