Diffusion and contagion in networks with heterogeneous agents and homophily

We study how a behavior (an idea, buying a product, having a disease, adopting a cultural fad or a technology) spreads among agents in an a social network that exhibits segregation or homophily (the tendency of agents to associate with others similar to themselves). Individuals are distinguished by their types (e.g., race, gender, age, wealth, religion, profession, etc.) which, together with biased interaction patterns, induce heterogeneous rates of adoption. We identify the conditions under which a behavior diffuses and becomes persistent in the population. These conditions relate to the level of homophily in a society, the underlying proclivities of various types for adoption or infection, as well as how each type interacts with its own type. In particular, we show that homophily can facilitate diffusion from a small initial seed of adopters.Diffusion, Homophily, Segregation, Social Networks

Segregation in social networks based on acquaintanceship and trust

Using newly collected data from the General Social Survey, we compare levels of segregation by race and along other potential dimensions of social cleavage for ties defined in terms of trust and acquaintanceship. We further estimate the size of the trust network and compare its size and structure to recent estimates obtained from the 2004 General Social Survey by McPherson et al. Americans are less disconnected than other recent evidence suggests. However, if racial segregation is the standard, then America is highly segregated across class and values dimensions as well as race and ethnicity. We further find that segregation is insensitive to tie strength. Scholars have long found homophily in close ties, while scholars such as Putnam have looked to weak ties for socially integrative bridging social capital. However, bridging social capital does not appear to be more plentiful for weak ties than it is for strong ties. --

A Biased Review of Sociophysics

Various aspects of recent sociophysics research are shortly reviewed: Schelling model as an example for lack of interdisciplinary cooperation, opinion dynamics, combat, and citation statistics as an example for strong interdisciplinarity.Comment: 16 pages for J. Stat. Phys. including 2 figures and numerous reference

Congregants and citizens: religious membership and naturalization among U.S. immigrants

Scholars and pundits have long debated whether religion helps new immigrants integrate politically in the United States. Those who see religion as an integrative institution cite the country’s history of vibrant religious congregationalism that supports connections between the native and foreign born, while critics point to anti-immigrant hostility, Christian nationalism, and patterns of religious membership that can reinforce social segregation. This article aims to adjudicate this debate, using a large sample of survey data, the New Immigrant Survey (NIS), fielded among new legal residents in 2003/2004. I find that religious membership is associated with increased probability of naturalizing in a short (3.5–7 years) timeframe and is stronger for those with greater human capital and income and longer tenure in the United States. Involvement in US-origin congregations also exhibits a stronger effect on naturalization than involvement in national-origin congregations. Additionally, I find that religious minorities, though less likely to be members of congregations, are independently more likely than Christian immigrants to naturalize in the same timeframe. These results are interpreted as support for a view of organized religion as a setting for American identity formation and a basis for mobilizing resources in response to anti-immigrant sentiment. For certain groups, organized religion seems to support a type of selective acculturation that combines American citizenship with the establishment and/or retention of a distinct ethno-religious identity. The article thus affirms, with caveats, the broader relevance of a long tradition of ethnographic scholarship on immigrant religion in the United States.Accepted manuscrip

To browse, or not to browse? Third person effect among Ultra-Orthodox Jewish women, in regards to the perceived danger of the internet

Abstract The study looks at Jewish ultra-Orthodox women who use modern technologies, for purposes that are illegitimate in their community. Subjects’ perceived impacts of the Internet on self and others are analyzed, demonstrating a "third-person effect" in regards to the perceived dangers originating from the Internet. The correlations and possible implications of the "third-person effect" are discussed

Homogeneity in Social Groups of Iraq

Homogeneity in Social Groups of Iraqis Jon Gresham, Farouk Saleh, Shara Majid June 2006 With appreciation to the Royal Institute for Inter-Faith Studies for initiating the Second World Congress for Middle Eastern Studies, this paper summarizes findings on homogeneity in community-level social groups derived from inter-ethnic research conducted during 2005 among Iraqi Arabs and Kurds living in the city of Basra, Iraq, and in the Netherlands. We found that perceptions towards out-groups were not based on religion, ethnicity, class, or location as in traditional individual-focused social networks. Patterns of perception towards out-groups seemed to be rooted in homogeneous social sub-groups with combinations of these factors. This research project used a 192-item survey of two hundred Iraqi business owners and managers in Iraq and in the Netherlands. It measured homogeneity of social group memberships. Survey elements included items drawn from the World Values Surveys (Inglehart), the Social Capital Community Benchmark Survey (Roper Center), and the Social Capital Inventory (Narayan and Cassidy). Homogeneity, relationship segregation, social trust, and community influence in social networks were estimated through indices reflecting components of social relationships in priority in-groups emerging from factor analysis of survey responses. Other indices included civic participation (socialization), perceptions of threat from out-groups, ethnic and religious identity, social trust, personal security, and contribution to community-based resources. Uniformity of responses to certain items about out-groups corresponded to findings by other authors on segregation and membership in social networks (Burt 1997, Buskins 2005, Inglehart 2004, Narayan and Cassidy 2001, Putnam 1995). This work was an expansion on a study on perceptions of threat from out-groups among Iraqis in five locations conducted in 2003 (Gresham 2004). This paper presents the following major sections: I. Introduction II. Purpose III. Background IV. Methodology V. Results VI. Reporting Process VII. Conclusions VIII. Further Work IX. Appendix X. End Notes *Jon Gresham, European Research Centre On Migration & Ethnic Relations, University of Utrecht, Netherlands Farouk Saleh, University of Tilburg, Netherlands Shara Majid, Erasmus University, Netherlands See other reports at: http://www.CivilSocietyIraq.seedwiki.co

Trends in Black-White Church Integration

Historically, the separation of blacks and whites in churches was well known (Gilbreath 1995; Schaefer 2005). Even in 1968, about four years after the passage of the landmark Civil Rights Act of 1964, Dr. Martin Luther King, Jr. still said that eleven o\u27clock on Sunday is the most segregated hour of the week (Gilbreath 1995:1). His reference was to the entrenched practice of black and white Americans who worshiped separately in segregated congregations even though as Christians, their faith was supposed to bring them together to love each other as brothers and sisters. King\u27s statement was not just a casual observation. One of the few places that civil rights workers failed to integrate was churches. Black ministers and their allies were at the forefront of the church integration movement, but their stiffest opposition often came from white ministers. The irony is that belonging to the same denomination could not prevent the racial separation of their congregations. In 1964, when a group of black women civil rights activists went to a white church in St. Augustine, Florida to attend a Sunday service, the women were met by a phalanx of white people with their arms linked to keep the activists out (Bryce 2004). King\u27s classic Letter from a Birmingham Jail was a response to white ministers who criticized him and the civil rights movement after a major civil rights demonstration (King [2002])

Social Networks and Decision Making: Women’s Participation in Household Decisions

Decision making is always been an important in social setting. For understanding the process of decision making it is important to understand as to how people make decisions and the factors influence the decisions. Studies (Srinivasan and Sharan 2005, Pescosolido, 1992) show that decisions are not made in isolation but they are the products of influence and confluence of social correlates. These studies emphasize that the decisions are not made in isolation but in consultation with other members. This raises an important question of how individual’s choices no longer of his or her own but socially constructed. This emphasizes how individuals consult with others while making decisions. From this it clear that the matters relating to health are also decided in consultation with the other members of the community. From this we can understand how decision making is important in a family setting for an individual. Literatures on social network (Srinivasan and Sharan 2005) have suggested the importance of social interaction on health decisions. They also suggest social networks help the individuals to learn to handle problematic situations. In National Family Health Survey (NFHS-3)(2005-06), under “Women’s empowerment and demographic and health outcomes” discussed the importance of wife’s participation in household decision making. According to NFHS-3, it is important to study the above aspect which will help in understanding the status and empowerment of women in society and within their households. It is thus critical to promote change in reproductive behaviour. This reminds the importance of Social Network by Bott(1957).According Bott Social Network is conjugal role relationships. According to her the degree of segregation in the role relationship of husband and wife varies directly with the connectedness of the family’s social network. The more connected the network, the greater the degree of segregation between the roles of husband and wife and vice versa.Health Management, Women, Family, Health seeking behaviour

Ethnicity and Earnings in Urban Peru

In this paper we study the relationship between ethnic exclusion and earnings in Urban Peru. Our approach to the concept of ethnicity involves the usage of instruments in many of its several dimensions: mother tongue, parental background, religion, migration events and race. In order to approximate what can be called racial differences in a context like the Peruvian in which "racial mixture" is the main characteristic of the population, we use a score-based procedure to capture both the differences and the mixtures. By means of this procedure each individual is assigned intensities by pollsters in each of the four categories that correspond to the most easily recognized distinct racial groups in the Peruvian society: Asiatic, White, Indigenous, and Black. We find that the multidimensional race indicator is correlated with several human capital and physical capital assets, as well as with access to public services. Using Blinder-Oaxaca (B-O) decompositions we find that a substantial part of the earnings differences between racial groups cannot be explainged by differences in individual characteristics. To take into account the fact that B-O doesn't consider the probability distribution of the individual characteristics, and specifically race in our case, we also use a semi-parametric technique for the estimation of differences in hourly earnings. This estimation treats the typical wage equations in a linear fashion but let estimators for the racial intensity effects to interact freely, without restricting them to a functional form. The results suggests that among wage earners after controlling for a large set of characteristics, there are racially related earnings differences in favor of predominantly White individuals. In the case of the self-employed, none of the empirical distributions of earning differences attributable to race is substantially above zero.race discrimination, minorities, wage differentials, semi-parametric