A new report published by the Federal Reserve Bank in San Francisco analyzes recent studies of how immigrants impact employment and productivity in the US. Considering the hysteria about the “threat” of immigrants to the United States economy, I thought it would be worthwhile to highlight some of the salient points in the research paper. According to the report:
These [research] studies systematically analyze how immigrants affect total output, income per worker, and employment in the short and long run. Consistent with previous research, the analysis finds no significant effect of immigration on net job growth for U.S.-born workers in these time horizons. This suggests that the economy absorbs immigrants by expanding job opportunities rather than by displacing workers born in the United States. Second, at the state level, the presence of immigrants is associated with increased output per worker. This effect emerges in the medium to long run as businesses adjust their physical capital, that is, equipment and structures, to take advantage of the labor supplied by new immigrants. However, in the short run, when businesses have not fully adjusted their productive capacity, immigrants reduce the capital intensity of the economy. Finally, immigration is associated with an increase in average hours per worker and a reduction in skills per worker as measured by the share of college-educated workers in a state. These two effects have opposite and roughly equal effect on labor productivity.
The report offers the following conclusions:
First, there is no evidence that immigrants crowd out U.S.-born workers in either the short or long run. Data on U.S.-born worker employment imply small effects, with estimates never statistically different from zero. The impact on hours per worker is similar. We observe insignificant effects in the short run and a small but significant positive effect in the long run. At the same time, immigration reduces somewhat the skill intensity of workers in the short and long run because immigrants have a slightly lower average education level than U.S.-born workers.
Second, the positive long-run effect on income per U.S.-born worker accrues over some time. In the short run, small insignificant effects are observed. Over the long run, however, a net inflow of immigrants equal to 1% of employment increases income per worker by 0.6% to 0.9%. This implies that total immigration to the United States from 1990 to 2007 was associated with a 6.6% to 9.9% increase in real income per worker. That equals an increase of about $5,100 in the yearly income of the average U.S. worker in constant 2005 dollars. Such a gain equals 20% to 25% of the total real increase in average yearly income per worker registered in the United States between 1990 and 2007.
The third result is that the long-run increase in income per worker associated with immigrants is mainly due to increases in the efficiency and productivity of state economies. This effect becomes apparent in the medium to long run. Such a gradual response of productivity is accompanied by a gradual response of capital intensity. While in the short run, physical capital per unit of output is decreased by net immigration, in the medium to long run, businesses expand their equipment and physical plant proportionally to their increase in production.
The report says that the effects of immigration on the economy can be explained by “adjustments businesses make over time that allow them to take full advantage of the new immigrant labor supply. These adjustments, including upgrading and expanding capital stock, provide businesses with opportunities to expand in response to hiring immigrants.”
Immigrants add to the dynamism of the US economy:
The U.S. economy is dynamic, shedding and creating hundreds of thousands of jobs every month. Businesses are in a continuous state of flux. The most accurate way to gauge the net impact of immigration on such an economy is to analyze the effects dynamically over time. Data show that, on net, immigrants expand the U.S. economy’s productive capacity, stimulate investment, and promote specialization that in the long run boosts productivity. Consistent with previous research, there is no evidence that these effects take place at the expense of jobs for workers born in the United States.