Unauthorized Immigration/Irregular Migration
Explore all research, analysis, commentary, and data on unauthorized immigrants and irregular migrants, terms used in different parts of the world to describe the individuals who lack the right to reside legally in their country of destination, as well as the policies and enforcement practices affecting them.
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Side-by-Side Comparison of 2013 Senate Immigration Bill with 2006 and 2007 Senate Legislation
The 2013 bipartisan Senate immigration overhaul advanced a more conditional, graduated legalization path and expanded merit-based visas compared to 2006 and 2007 predecessors.
Side-by-Side Comparison of the 2013 Senate Immigration Framework with 2006 and 2007 Senate Legislation
The 2013 Senate immigration framework shared broad goals with its 2006 and 2007 predecessors but departed sharply on enforcement triggers and legalization design.
Mexican Migration to the United States: Underlying Economic Factors and Possible Scenarios for Future Flows
Sectoral demand shifts—not just supply-side shocks—explain Mexican migration trends since 1990, and net flows are projected to stay well below 1990s peaks through 2017.
Sequester Affects Immigration Enforcement — and Invites Attention to Detention Policy
When the U.S. sequester forced the release of 2,228 immigration detainees, the political fallout spotlighted the high cost and contested logic of U.S. immigration detention.
Key Immigration Laws and Policy Developments Since 1986
Since enactment of the Immigration Reform and Control Act of 1986, U.S. immigration enforcement has expanded steadily while comprehensive reform has repeatedly stalled in Congress.
Major U.S. Immigration Laws, 1790 - Present
U.S. immigration law has swung between openness and restriction since 1790, with each era's legislation shaped by labor needs, national security fears, and racial politics.
Immigration Enforcement in the United States: The Rise of a Formidable Machinery
Release of a major report that describes and analyzes the immigration enforcement system in the United States as it has developed and grown in the quarter century since the Immigration Reform and Control Act of 1986 launched the current era of enforcement.
Immigration Enforcement in the United States: The Rise of a Formidable Machinery
The United States has built a formidable immigration enforcement system, spending nearly $187 billion since 1986—more than on all other principal federal criminal law enforcement combined.
