Immigration to the United States has been a major source of population growth and cultural change throughout much of its history. In absolute numbers, the United States has by far the highest number of immigrants in the world, with 50,661,149 people as of 2019. This represents 19.1% of the 244 million international migrants worldwide, and 14.4% of the United States' population. In 2018, there were almost 90 million immigrants and U.S.-born children of immigrants in the United States, accounting for 28% of the overall U.S. population.
Human capital flight is the emigration or immigration of individuals who have received advanced training at home. The net benefits of human capital flight for the receiving country are sometimes referred to as a "brain gain" whereas the net costs for the sending country are sometimes referred to as a "brain drain". In occupations with a surplus of graduates, immigration of foreign-trained professionals can aggravate the underemployment of domestic graduates, whereas emigration from an area with a surplus of trained people leads to better opportunities for those remaining. But emigration may cause problems for the home country if the trained people are in short supply there.
Immigration is the international movement of people to a destination country of which they are not usual residents or where they do not possess nationality in order to settle as permanent residents. Commuters, tourists, and other short-term stays in a destination country do not fall under the definition of immigration or migration; seasonal labour immigration is sometimes included, however.
Foreign nationals (aliens) can violate US immigration laws by entering the United States unlawfully or lawfully entering but then remaining after the expiration of their visas, parole, or temporary protected status. Illegal immigration has been a matter of intense debate in the United States since the 1980s.
Opposition to immigration, also known as anti-immigration, is a political ideology that seeks to restrict the incoming of people from one area to another. In the modern sense, immigration refers to the entry of people from one state or territory into another state or territory in which they are not citizens in contrast, but closely correspond to emigration which refers people leaving one state or territory in which they are citizens. Illegal immigration occurs when people immigrate to a country without having official permission to do so. Opposition to immigration ranges from calls for various immigration reforms, to proposals to completely restrict immigration, to calls for repatriation of existing immigrants.
Immigration and crime refers to the relationship between criminal activity and the phenomenon of immigration. The academic literature and official statistics provide mixed findings for the relationship between immigration and crime. Research in the United States tends to suggest that immigration either has no impact on the crime rate or even that immigrants are less prone to crime. A meta-analysis of 51 studies from 1994–2014 on the relationship between immigration and crime in the United States found that, overall, the immigration-crime association is negative, but the relationship is very weak and there is significant variation in findings across studies. This is in line with a 2009 review of high-quality studies conducted in the United States that also found a negative relationship.
Joshua David Angrist is an Israeli–American economist and Ford Professor of Economics at the Massachusetts Institute of Technology. Angrist, together with Guido Imbens, was awarded the Nobel Memorial Prize in Economics in 2021 "for their methodological contributions to the analysis of causal relationships".
Dennis J. Snower is an American-German economist, specialising in macroeconomic theory and policy, labor economics, digital governance, social economics, and the psychology of economic decisions in "caring economics". He is President of the Global Solutions Initiative in Berlin, Professorial Research Fellow at the Institute for New Economic Thinking at Oxford University, Fellow at the New Institute in Hamburg, and Non-resident Fellow of the Brookings Institution in Washington, D.C. He is former president of the Kiel Institute for the World Economy. His prominent labor research explores the role of “insiders” and “outsiders” in generating unemployment and macroeconomic fluctuations; his socio-economic research examines how social groups shape economic behavior; his psycho-economic research explains how economic decisions depend on psychological motives; and his macroeconomic research investigates why inflation and unemployment can move in opposite directions even in the long run.
The economic impact of illegal immigrants in the United States is challenging to measure and politically contentious. Research shows that undocumented immigrants increase the size of the U.S. economy/contribute to economic growth, enhance the welfare of natives, contribute more in tax revenue than they collect, reduce American firms' incentives to offshore jobs and import foreign-produced goods, and benefit consumers by reducing the prices of goods and services.
Michael Andrew Clemens is an American economist who studies international migration and global economic development.
Women migrant workers from developing countries engage in paid employment in countries where they are not citizens. While women have traditionally been considered companions to their husbands in the migratory process, most adult migrant women today are employed in their own right. In 2017, of the 168 million migrant workers, over 68 million were women. The increase in proportion of women migrant workers since the early twentieth century is often referred to as the "feminization of migration".
Alison L. Booth is an Australian labour economist and novelist who is professor of economics at the Australian National University. She is the author of six novels. These are Stillwater Creek (2010), The Indigo Sky (2011), A Distant Land (2012), A Perfect Marriage (2018), The Philosopher's Daughters (2020) and The Painting (2021).
David H. Autor is an American economist, public policy scholar, and professor of economics at the Massachusetts Institute of Technology (MIT), where he also acts as co-director of the School Effectiveness and Inequality Initiative. Although Autor has contributed to a variety of fields in economics his research generally focuses on topics from labor economics.
Klaus Felix Zimmermann is a German economist and emeritus professor of economics at Bonn University. Additionally, he is an honorary professor at Maastricht University, the Free University of Berlin and the Renmin University of China as well as president of the Global Labor Organization. His research interests include population, labour, development and migration, with Zimmermann being among the leading economists on the topic of migration.
Deborah Ann Cobb-Clark is an Australian economist. She is currently working as a Professor in the University of Sydney and as a Chief Investigator in the ARC Centre of Excellence for Children and Families over the Life Course. She has also worked in Bonn, Germany at the Institute for the Study of Labor (IZA) since 2000, where she holds the position of director of the Program in Gender and Families.
Hillel Rapoport is an economist at the University of Paris 1 Pantheon-Sorbonne and Paris School of Economics. He specializes on the dynamics of migration and its impact on economic development as well as on the economics of immigration, diversity, and refugees' relocation and resettlement and ranks as one of the leading economists on the topic of migration.
Xin Meng is a Chinese economist and professor at the Research School of Economics, College of Business and Economics (CBE), Australian National University (ANU). She is also a member of the Association for Comparative Economic Studies, the American Economic Association, the Society of Labor Economics and Royal Economic Society. Her main research interests include Labour Economics, Development Economics, Applied Microeconomics and Economics of Education. She focuses on researching issues about the Chinese labour market during transition, the influence of corporations and gender discrimination, the economic assimilation of immigrants and the economic implications of major catastrophes. Meng was elected a Fellow of the Academy of the Social Sciences in Australia in 2008.
Almost half of international migrants are women, generally travelling as either migrant workers or refugees. Women migrant workers migrate from developing countries to high-income countries to engage in paid employment, typically in gendered professions such as domestic work. Because their work disproportionately takes place in private homes, they are vulnerable to exploitation and abuse. Wages earned are largely sent home to the originating country to support the cost of living of the family left behind.
Matthias Doepke is a German economist, currently Professor of Economics at the London School of Economics and Political Science and Gerald F. and Marjorie G. Fitzgerald Professor of Economic History at Northwestern University. His research focuses on economic growth, development, political economy and monetary economics.
Immigration to the United States has many effects on the culture and politics of the United States.
