Immigrants, particularly low-education immigrants (many of whom are unauthorized), are more responsive than natives to the business cycle" (Orrenius 97). Orrenius points out that immigration positively influences the United States economy by providing a large supply of workers when hiring demand is high under the condition that native workers must be rare. This is a reasonable point because the previous mentioned natives are eligible for a larger pool of job applications while immigrants (illegal for this case) are limited to certain under-the-counter job offers. In Brain Drain Revisited, Carrington explains how immigration increases the GDP of the country receiving immigrants. Carrington points out the reason why immigration is favorable by reasoning that "The reason is very simple. By allowing people to move to countries where they can produce four to five times more value per hour of work on average than in their country of origin, migrations allow the deployment of world human resources in a massively more efficient way" (Carrington 37). Carrington implies in theory, by allocate people (immigrants) to a country where wage is high, human resource will functioning at maximum output level to provide the optimal benefits to the country receiving immigrants. This is a significant statement because the United States has one of the world's highest per capita incomes; therefore most immigrants will increase the United States GDP while providing the United States with a lasting source of cheap labor force. In Immigration and the Imagined Community in Europe and the United States, Citrin explains statistic research on European origin immigrants in the United States. In the article, Citrin points out: .
The mean for the United States sample is lower than in a majority of the countries, but the confidence intervals suggest that there is no statistically significant difference between the US mean and those of many other countries.