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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Social Security 'No-Match' Letters: A Primer

Social Security no-match letters became an immigration enforcement tool under 2007 guidance, a shift that has raised significant legal concerns about worker discrimination.

Immigration and the 2007 French Elections

Immigration dominated France's 2007 presidential race as Nicolas Sarkozy and Ségolène Royal offered sharply contrasting visions on enforcement and integration.