This study was conducted to examine whether a rising crime rate in El Paso, Texas and San Diego, California in 1986 could be attributed to, among other factors, the influx of undocumented aliens. Variables include level of involvement of undocumented aliens in serious felony arrests in San Diego and El Paso Counties, the outcome of serious felony arrest cases involving undocumented persons compared to others arrested for similar offenses, the impact of arrests of undocumented aliens on the criminal justice system in terms of workload and cost, the extent that criminal justice agencies coordinate their efforts to apprehend and process undocumented aliens who have committed serious crimes in San Diego and El Paso counties, and how differences in agency objectives impede or enhance coordination. Data are also provided on how many undocumented persons were arrested/convicted for repeat offense in these counties and which type of policies or procedures could be implemented in criminal justice agencies to address the issue of crimes committed by undocumented aliens. Data were collected in the two cities with focus on serious felony offenses. The collection includes sociodemographic characteristics, citizenship status, current arrest, case disposition, and prior criminal history with additional data from San Diego to compute the costs involving undocumented aliens.

The estimated population of unauthorized immigrants in the U.S. stands at around 11 million people. Although the number has stabilized, the United States has seen a spike in migrant encounters in the last few years, with over two million cases registered by the U.S. Border Patrol in 2023. This is a slight decrease from the previous year, when there were over 2.2 million cases registered. Due to its proximity and shared border, Mexico remains the leading country of origin for most undocumented immigrants in the U.S., with California and Texas being home to the majority.

Immigration and political division

Despite the majority of the population having immigrant roots, the topic of immigration in the U.S. remains one of the country’s longest-standing political debates. Support among Republicans for restrictive immigration has grown alongside Democratic support for open immigration. This growing divide has deepened the polarization between the two major political parties, stifling constructive dialogue and impeding meaningful reform efforts and as a result, has led to dissatisfaction from all sides. In addition to general immigration policy, feelings toward illegal immigration in the U.S. also vary widely. For some, it's seen as a significant threat to national security, cultural identity, and economic stability. This perspective often aligns with support for stringent measures like Trump's proposed border wall and increased enforcement efforts. On the other hand, there are those who are more sympathetic toward undocumented immigrants, as demonstrated by support for the Deferred Action for Childhood Arrivals (DACA) program.

Thailand Number of Aliens Work Permit: Illegal Immigrant data was reported at 66,483.000 Unit in Oct 2018. This records an increase from the previous number of 65,125.000 Unit for Sep 2018. Thailand Number of Aliens Work Permit: Illegal Immigrant data is updated monthly, averaging 25,261.000 Unit from Jan 1994 (Median) to Oct 2018, with 298 observations. The data reached an all-time high of 206,014.000 Unit in Nov 1997 and a record low of 4,557.000 Unit in Nov 1996. Thailand Number of Aliens Work Permit: Illegal Immigrant data remains active status in CEIC and is reported by Office of Foreign Workers Administration (Work Permit). The data is categorized under Global Database’s Thailand – Table TH.G007: No of Aliens Work Permit.

Thailand Number of Aliens Work Permit: Pg: Illegal Immigrants data was reported at 4,705.000 Unit in Dec 2017. This records an increase from the previous number of 4,347.000 Unit for Nov 2017. Thailand Number of Aliens Work Permit: Pg: Illegal Immigrants data is updated monthly, averaging 4,461.000 Unit from Jan 2014 (Median) to Dec 2017, with 48 observations. The data reached an all-time high of 13,608.000 Unit in Mar 2017 and a record low of 2,460.000 Unit in Jan 2014. Thailand Number of Aliens Work Permit: Pg: Illegal Immigrants data remains active status in CEIC and is reported by Department of Employment. The data is categorized under Global Database’s Thailand – Table TH.G007: No of Aliens Work Permit.

Graph and download economic data for Employment Level - Foreign Born (LNU02073395) from Jan 2007 to May 2025 about foreign, household survey, employment, and USA.

This statistic shows the estimated costs associated with deporting all illegal aliens in the United States, as of 2015. The lower estimate for the total cost of deportation of illegal aliens in the U.S. was 103.9 billion U.S. dollars as of 2015.

Explore Joe's law : America's toughest sheriff takes on illegal immigration, drugs, and everything else that threatens America through data from visualizations to datasets, all based on diverse sources.

Transatlantic Trends: Immigration, 2010 examined attitudes and policy preferences related to immigration in Europe, Canada, and the United States. The survey concentrated on the most important issues facing the respondent's country, general perceptions of immigration and immigrants, perceptions of legal and illegal immigrants, the impact of immigration on society, conditions for citizenship, policies on legal and illegal immigration, access to social benefits, government evaluation, decision-making level, socio-political rights, consequences of an aging society, immigration and integration, economic evaluation, vote intention, and political party identification. Demographic and other background information includes gender, age, age when stopped full-time education and stage at which full-time education was completed, religious affiliation, ethnicity, citizenship, origin of birth (personal and parental), type of locality, region of residence, and language of interview.

Data and Stata codes for replication of "Intermarriage Amid Immigration Status Uncertainty: Evidence from DACA"

Thailand Number of Aliens Work Permit: Annual: Pg Illegal Immigrants data was reported at 73,692.000 Person in 2017. This records an increase from the previous number of 49,732.000 Person for 2016. Thailand Number of Aliens Work Permit: Annual: Pg Illegal Immigrants data is updated yearly, averaging 50,254.500 Person from Dec 2010 (Median) to 2017, with 8 observations. The data reached an all-time high of 73,692.000 Person in 2017 and a record low of 47,793.000 Person in 2010. Thailand Number of Aliens Work Permit: Annual: Pg Illegal Immigrants data remains active status in CEIC and is reported by Department of Employment. The data is categorized under Global Database’s Thailand – Table TH.G007: No of Aliens Work Permit.

These materials contain the files necessary to replicate the tables and figures presented in 'Immigration Policies and Access to the Justice System: The Effect of Enforcement Escalations on Undocumented Immigrants and Their Communities.'

Explore Illegal aliens through data • Key facts: number of authors, number of books, books, authors, publication dates, book publishers • Real-time news, visualizations and datasets

Many countries have become increasingly aggressive in their efforts to stop unauthorized migration, but most evidence suggests that immigration enforcement policies do not effectively deter migrants. We draw on literature from social psychology, specifically the dual-system model of decision-making, which differentiates between judgments that are subject to considerations of risks and costs and judgments that are “non-consequentialist.” Non-consequentialist decision-making is founded in moral intuition and rejects rational considerations of costs and benefits. This mental process would render the deterrence tools of the state powerless. We posit that some, but not all, forms of unauthorized migration will invoke non-consequentialist decision-making. When considering semi-legal strategies, which individuals may perceive as “bending the law” rather than breaking it, aspiring migrants are likely to weigh the risks and costs of enforcement policies. Meanwhile, when considering fully illegal migration strategies, aspiring migrants will prioritize moral considerations for breaking the law rather than the consequences of breaking the law. We find evidence for our theory using original population-based list experiments along with focus groups of aspiring migrants in an origin country.

The day-to-day behaviors of undocumented immigrants are significantly affected when local law enforcement officials do the work of federal immigration enforcement. One such behavior, which has been widely discussed in debates over sanctuary policies, is that undocumented immigrants are less likely to report crimes to the police when local law enforcement officials work with U.S. Immigration and Customs Enforcement (ICE) on federal immigration enforcement. However, the mechanism that explains this relationship, which is decreased trust in law enforcement, has not yet been systematically tested. Do undocumented immigrants become less trusting of police officers and sheriffs when local law enforcement officials work with ICE on federal immigration enforcement? To answer this question, we embedded an experiment that varied the interior immigration enforcement context in a survey (n = 512) drawn from a probability-based sample of undocumented immigrants. When local law enforcement officials work with ICE on federal immigration enforcement, respondents are statistically significantly less likely to say that they trust that police officers and sheriffs will keep them, their families, and their communities safe, protect the confidentiality of witnesses to crimes even if they are undocumented, protect the rights of all people, including undocumented immigrants, equally, and protect undocumented immigrants from abuse or discrimination.