Variety Is the Spice of Life: Diverse Social Networks Are Associated With Social Cohesion and Well-Being.

Both homophily and heterophily are observed in humans. Homophily reinforces homogeneous social networks, and heterophily creates new experiences and collaborations. However, at the extremes, high levels of homophily can cultivate prejudice toward out-groups, whereas high levels of heterophily can weaken in-group support. Using data from 24,726 adults (M = 46 years; selected from 10,398 English neighborhoods) and the composition of their social networks based on age, ethnicity, income, and education, we tested the hypothesis that a middle ground between homophily and heterophily could be the most beneficial for individuals. We found that network homophily, mediated by perceived social cohesion, is associated with higher levels of subjective well-being but that there are diminishing returns, because at a certain point increasing network homophily is associated with lower social cohesion and, in turn, lower subjective well-being. Our results suggest that building diverse social networks provides benefits that cannot be attained by homogeneous networks.

The New System of Mexican Migration: The Role of Entry Mode-Specific Human and Social Capital.

Between 2000 and 2020, undocumented migration declined, temporary labor migration rose, and legal permanent residents arrived at a steady pace-together creating a new system of Mexico-U.S. migration based on the circulation of legal temporary workers and permanent residents. Drawing on data from the U.S. Department of Homeland Security and the Mexican Migration Project, we specify multinomial event-history models to predict the likelihood of departure on first and later trips via four entry categories: no documents, noncompliant tourist visas, temporary work visas, and legal residence visas. The models reveal how the accumulation of entry mode-specific social and human capital powered a system of undocumented migration that emerged between 1965 and 1985, and how that system deteriorated from 1985 to 2000. After 2000, employers took advantage of new visa categories to recruit legal temporary workers, leading to the accumulation of migration-related human and social capital specific to that mode of entry and the emergence of a new system of Mexico-U.S. migration.

Systemic racism: individuals and interactions, institutions and society.

Systemic racism is a scientifically tractable phenomenon, urgent for cognitive scientists to address. This tutorial reviews the built-in systems that undermine life opportunities and outcomes by racial category, with a focus on challenges to Black Americans. From American colonial history, explicit practices and policies reinforced disadvantage across all domains of life, beginning with slavery, and continuing with vastly subordinated status. Racially segregated housing creates racial isolation, with disproportionate costs to Black Americans' opportunities, networks, education, wealth, health, and legal treatment. These institutional and societal systems build-in individual bias and racialized interactions, resulting in systemic racism. Unconscious inferences, empirically established from perceptions onward, demonstrate non-Black Americans' inbuilt associations: pairing Black Americans with negative valences, criminal stereotypes, and low status, including animal rather than human. Implicit racial biases (improving only slightly over time) imbed within non-Black individuals' systems of racialized beliefs, judgments, and affect that predict racialized behavior. Interracial interactions likewise convey disrespect and distrust. These systematic individual and interpersonal patterns continue partly due to non-Black people's inexperience with Black Americans and reliance on societal caricatures. Despite systemic challenges, Black Americans are more diverse now than ever, due to resilience (many succeeding against the odds), immigration (producing varied backgrounds), and intermarriage (increasing the multiracial proportion of the population). Intergroup contact can foreground Black diversity, resisting systemic racism, but White advantages persist in all economic, political, and social domains. Cognitive science has an opportunity: to include in its study of the mind the distortions of reality about individual humans and their social groups.

Does ethnic diversity affect well-being and allostatic load among people across neighbourhoods in England?

Modern societies are facing unprecedented changes in their ethnic composition. Increasing ethnic diversity poses critical new challenges as people interact with new cultures, norms, and values, or avoid such encounters. Heated academic and political debates focus on whether and how changes in ethnic composition affect societies and local communities. Yet, there is insufficient scientific evidence of how living in a more diverse society affects individuals' well-being and health. The aim of this study is to test the extent to which increasing neighbourhood ethnic diversity affects individuals' subjective health and well-being and objective stress levels as measured by allostatic load. We analyse a large panel data set containing over 47,000 English respondents living in 15,545 neighbourhoods in England from the British Household Panel Survey and the UK Household Longitudinal Study, from 2004 to 2011. We match respondents to neighbourhoods and merge contextual information about levels of neighbourhood ethnic diversity and deprivation from UK Censuses, whilst controlling for background characteristics. We distinguish between short- and long-term effects of ethnic diversity on individual subjective well-being and health as well as allostatic load using a set of multilevel mixed-effects models. We make cautious causal interpretations by estimating fixed-effects models and cross-lagged panel models. We assess the robustness of our findings by replicating our analysis using alternative composite measures of diversity and allostatic load. In the short-term, increasing ethnic diversity of local areas is associated with a dip in subjective well-being, but short-term changes are not prolonged or profound enough to affect chronic stress (allostatic load). The initial negative impact of ethnic diversity on subjective well-being and health dissipates with time. In the long-term, no effects of ethnic diversity on well-being and health or chronic stress (allostatic load) are detected. Understanding the dynamic nature of the effects of ethnic diversity on individuals has critical implications for social and public health policies - issues prominent in, for example, the UK (Brexit) and the US (election of President Donald Trump). Our analysis identifies and enables the promotion of beneficial effects, while targeting the pernicious components to turn diversity into a valuable asset in a globalising world.

Creating the exclusionist society: from the War on Poverty to the war on immigrants.

A series of policy decisions beginning in 1965 produced an exclusionist climate in the United States. Lyndon Johnson sought to eliminate prejudice from the nation's immigration system but inadvertently curtailed opportunities for legal entry from Mexico that created a large undocumented population. In waging the Cold War, Ronald Reagan launched an intervention in Central America that displaced many more thousands who also became undocumented residents. The Wars on Crime and Drugs of Presidents Nixon and Reagan created a prison industrial complex that imprisoned blacks and Hispanics. George Bush's War on Terror unleashed a rising tide of deportations swept Latino migrants into the immigrant detention system. Finally, President Trump transformed a humanitarian problem affecting Central American families and children into a manufactured immigration crisis for the nation as a whole. The result is among the most repressive and exclusionist context of immigrant reception in American history.

The Real Crisis at the Mexico-U.S. Border: A Humanitarian and Not an Immigration Emergency.

Misguided U.S. Policies since 1980 have created a large undocumented population within the United States. Border militarization curtailed circular undocumented migration from Mexico and Cold War politics precluded the acceptance of refugees from Central America fleeing violence and economic turmoil unleashed by America's intervention in the region. Although undocumented migration from Mexico has ended, resources devoted to border apprehensions and internal deportations continue to rise, pushing an ever larger number of Central Americans into an immigrant detention system that is ill-equipped to handle them. Although the Trump Administration portrays the situation as an immigration crisis, what is really unfolding along the border and within the United States is an unprecedented humanitarian cross that in so many ways is one of our own making.

Lethal Violence and Migration in Mexico: An Analysis of Internal and International Moves.

We analyze the effect of homicide in Mexico on patterns and processes of internal and international migration. Linking municipal-level homicide rates from 1990 through 2018 with data from the Mexican Migration Project, we estimate a series of multinomial discrete time event history models to assess the effect that exposure to lethal violence has on the likelihood of migration within Mexico and to the United States without documents. Statistical estimates indicate that the homicide rate negatively predicts the likelihood of taking a first undocumented trip to the United States but positively predicts the likelihood of taking a first trip within Mexico. Among those undocumented migrants who have already taken a first U.S. trip, lethal violence also negatively predicts the likelihood of taking a second undocumented trip. Among returned internal migrants whose first trip was to a Mexican destination, the odds of taking a first U.S. trip were also negatively predicted by the municipal homicide rate. We conclude that rising violence in Mexico is not a significant driver of undocumented migration to the United States. Instead it contributes to the decline in undocumented out-migration observed since 2007, in combination with the rising age of those at risk of migration and the growing access of Mexicans to legal entry visas.

Analizamos el efecto de homicidio en México sobre patrones y procesos de migración interna y internacional. Conectando tasas de homicidio municipales desde 1990 a 2018 con datos del Proyecto Mexicano de Migración, estimamos una serie de modelos multinomiales de tiempo discreto para evaluar el efecto de la violencia mortal sobre la probabilidad de migrar dentro de México o hacia los Estados Unidos sin documentos. Estimaciones indican que la tasa de homicidio predice negativamente la probabilidad de tomar un primero viaje a los Estandos uniods per predice positivamente la probabilidad de tomar un primero viaje dentro de México. Entre los migrantes indocumentados quien ya se han hecho un primer viaje a los Estados Unidos, violencia mortal también predice negativamente la probabilidad de hacer un segundo viaje indocumentado. Entre migrantes retornados de un primer viaje dentro de México, la probabilidad de hacer un primero viaje indocumentado a los EE. UU. también están predicidos negativamente por la tasa de homicide municipal. Concluimos que el crecimiento de violencia mortal en México no es una causa de la migración indocumentada a los Estados Unidos. Al contrario, la violencia contribuya a la la disminución en migración indocumentada observada desde 2007, en combinación con el aumento de la edad promedia y el acceso creciente a visas legales para entrar los EE. UU.

Immigration Policy Mismatches and Counterproductive Outcomes: Unauthorized Migration to the U.S. in Two Eras.

The world appears to be moving into a new era of international migration during which gaps between policies needed to manage migratory flows and those enacted in practice will widen. Whereas immigrants in the late 20th century were motivated by a desire to improve their wellbeing by accessing opportunities in richer countries, in the early 21st century they are increasingly motivated by a desire to escape threats at places of origin, yielding very different patterns of migration and selectivity. Using the United States as an example, this paper reviews how mismatches between the underlying realities of international migration and the policies adopted to manage them, in both eras have produced and continue to produce dysfunctional outcomes. Although deleterious policy outcomes might be avoided in the future by combining a well-grounded conceptual understanding of the forces producing immigration with a clear statement of the goals to be achieved through specific policy interventions, the avoidance of further dysfunctional outcomes is unlikely to be achieved in an age of rising populism, disinformation, and xenophobia.

Humans adapt to social diversity over time.

Humans have evolved cognitive processes favoring homogeneity, stability, and structure. These processes are, however, incompatible with a socially diverse world, raising wide academic and political concern about the future of modern societies. With data comprising 22 y of religious diversity worldwide, we show across multiple surveys that humans are inclined to react negatively to threats to homogeneity (i.e., changes in diversity are associated with lower self-reported quality of life, explained by a decrease in trust in others) in the short term. However, these negative outcomes are compensated in the long term by the beneficial influence of intergroup contact, which alleviates initial negative influences. This research advances knowledge that can foster peaceful coexistence in a new era defined by globalization and a socially diverse future.

Debacles on the Border: Five Decades of Fact-Free Immigration Policy.

Since 1987 the Mexican Migration Project (MMP) has compiled extensive data on the characteristics and behavior of documented and undocumented migrants to the United States and made them publicly available to users to test theories of international migration and evaluate U.S. immigration and border policies. Findings based on these data have been plentiful, but have also routinely been ignored by political leaders who instead continue to pursue policies with widely documented, counterproductive effects. In this article we review prior studies based on MMP data to document these effects. We also use official statistics to document circumstances on the border today, and draw on articles in this volume to underscore the huge gap between U.S. policies and the realities of immigration. Despite that net positive undocumented Mexican migration to the U.S. ended more than a decade ago, the Trump administration continues to demand the construction of a border wall and persists in treating Central American arrivals as criminals rather than asylum seekers, thus transforming what is essentially a humanitarian problem into an immigration crisis.

Evolution of the Mexico-U.S. Migration System: Insights from the Mexican Migration Project.

Since 1987 the Mexican Migration Project has collected and disseminated representative survey data on documented and undocumented migration to the United States. The MMP currently includes surveys of 161 communities, which together contain data on 27,113 households and 169,945 individuals, 26,446 of whom have U.S. migratory experience. These data are here used to trace the evolution of the Mexico-U.S. migration system from the late 19th to the early 21st century, revealing how shifts in U.S. immigration and border policies have been critical to the formation of different eras of migration characterized by distinctive patterns of migration, settlement, and return in different legal statuses. The present era is characterized by the repression of the large population of undocumented migrants and their U.S. citizen children by an ongoing regime of mass detention and deportation and the simultaneous recruitment of Mexican workers for exploitation on short term temporary visas. The future of Mexican migration to the United States will be revealed by subsequent waves of data collection by the Mexican Migration Project.

The Ethnosurvey Revisited: New Migrations, New Methodologies?

This article provides a detailed review of the ethnosurvey, a research methodology that has been widely applied to the study of migration for almost four decades. We focus on the application of ethnosurvey methods in Mexico and Poland, drawing on studies done in the former country since the early 1980s and in the latter since the early 1990s (including several post-2004 examples). The second case is particularly relevant for our analysis as it refers to a number of novel migration forms that have been identified in Central and Eastern Europe in the post-1989 transition period. Drawing these studies, we consider the advantages and disadvantages of the ethnosurvey as a research tool for studying international migration. Its advantages include its multilevel design, its blend of qualitative and quantitative methods, its reliance on retrospective life histories, and its multisite data collection strategy. These features yield a rich database that has enabled researchers to capture circular, irregular, short-term, and sequential movements. Its disadvantages primarily stem from its hybrid sampling strategy, which necessarily places limits on estimation and generalizability, and the technical challenges of parallel sampling in communities of both origin and destination. Here we argue that the ethnosurvey was never proposed and should not be taken as a universal methodology applicable in all circumstances. Rather it represents a specialized tool that when correctly applied under the right conditions can be extremely useful in revealing the social and economic mechanisms that underlie human mobility, thus yielding a fuller understanding of international migration's complex causes and diverse consequences in both sending and receiving societies.

Scientific communication in a post-truth society.

Within the scientific community, much attention has focused on improving communications between scientists, policy makers, and the public. To date, efforts have centered on improving the content, accessibility, and delivery of scientific communications. Here we argue that in the current political and media environment faulty communication is no longer the core of the problem. Distrust in the scientific enterprise and misperceptions of scientific knowledge increasingly stem less from problems of communication and more from the widespread dissemination of misleading and biased information. We describe the profound structural shifts in the media environment that have occurred in recent decades and their connection to public policy decisions and technological changes. We explain how these shifts have enabled unscrupulous actors with ulterior motives increasingly to circulate fake news, misinformation, and disinformation with the help of trolls, bots, and respondent-driven algorithms. We document the high degree of partisan animosity, implicit ideological bias, political polarization, and politically motivated reasoning that now prevail in the public sphere and offer an actual example of how clearly stated scientific conclusions can be systematically perverted in the media through an internet-based campaign of disinformation and misinformation. We suggest that, in addition to attending to the clarity of their communications, scientists must also develop online strategies to counteract campaigns of misinformation and disinformation that will inevitably follow the release of findings threatening to partisans on either end of the political spectrum.

Suburbanization and Segregation in the United States: 1970-2010.

Analysis of trends in the suburbanization of whites, blacks, Asians, and Hispanics reveal that all groups are becoming more suburbanized, though the gap between whites and minorities remains large. Although central cities have made the transition to a majority-minority configuration, suburbs are still overwhelmingly white. Levels of minority-white segregation are nonetheless lower in suburbs than cities. Blacks remain the most segregated group at both locations. Black segregation and isolation levels are declining in cities and suburbs, however, while Hispanic and Asian segregation levels have remained stable and spatial isolation levels have risen. Multivariate analyses suggest that Hispanics achieve desegregation indirectly by using socioeconomic achievements to gain access to less-segregated suburban communities and directly by translating r status attainments into residence in white neighborhoods. Blacks do not achieve desegregation indirectly through suburbanization and they are much less able than Hispanics to use their socioeconomic attainments directly to enter white neighborhoods.

The Social Structure of Mortgage Discrimination.

In the decade leading up to the U.S. housing crisis, black and Latino borrowers disproportionately received high-cost, high-risk mortgages-a lending disparity well documented by prior quantitative studies. We analyze qualitative data from actors in the lending industry to identify the social structure though which this mortgage discrimination took place. Our data consist of 220 depositions, declarations, and related exhibits submitted by borrowers, loan originators, investment banks, and others in fair lending cases. Our analyses reveal specific mechanisms through which loan originators identified and gained the trust of black and Latino borrowers in order to place them into higher-cost, higher-risk loans than similarly situated white borrowers. Loan originators sought out lists of individuals already borrowing money to buy consumer goods in predominantly black and Latino neighborhoods to find potential borrowers, and exploited intermediaries within local social networks, such as community or religious leaders, to gain those borrowers' trust.

Neighborhood Disadvantage and Telomere Length: Results from the Fragile Families Study.

Telomeres are repetitive nucleotide sequences located at the ends of chromosomes that protect genetic material. We use data from the Fragile Families and Child Wellbeing Study to analyze the relationship between exposure to spatially concentrated disadvantage and telomere length for white and black mothers. We find that neighborhood disadvantage is associated with shorter telomere length for mothers of both races. This finding highlights a potential mechanism through which the unique spatially concentrated disadvantage faced by African Americans contributes to racial health disparities. We conclude that equalizing the health and socioeconomic status of black and white Americans will be very difficult without reducing levels of residential segregation in the United States.