Social networks and HIV/AIDS risk perceptions

Understanding the determinants of individuals' perceptions of their risk of becoming infected with HIV and their perceptions of acceptable strategies of prevention is an essential step toward curtailing the spread of this disease. We focus in this article on learning and decision-making about AIDS in the context of high uncertainty about the disease and appropriate behavioral responses. We argue that social interactions are important for both. Using longitudinal survey data from rural Kenya and Malawi, we test this hypothesis. We investigate whether social interactions--and especially the extent to which social network partners perceive themselves to be at risk--exert causal influences on respondents' risk perceptions and on one approach to prevention, spousal communication about the threat of AIDS to the couple and their children. The study explicitly allows for the possibility that important characteristics, such as unobserved preferences or community characteristics, determine not only the outcomes of interest but also the size and composition of networks. The most important empirical result is that social networks have significant and substantial effects on risk perceptions and the adoption of new behaviors even after we control for unobserved factors.     

Social Networks and Unobserved Heterogeneity in Risk for AIDS

As a sexually transmitted disease, AIDS spreads along social networks; consequently,it is reasonable to propose to utilize these networks in teaching people to avoid practices that put them at increased risk of contracting AIDS. Most obviously, homosexual men are both at relatively high risk of contracting AIDS, and in many urban areas have well crystallized community structures and high social connectivity. We present evidence suggesting that using such social networks can have the unanticipated consequence of reaching a set of men who are at relatively low risk. Evidently, there is great unobserved heterogeneity among the population in terms of risk, and while this heterogeneity is not captured by conventional measures of risk behavior, it is closely linked to network processes.     

Social networks, perceptions of risk, and changing attitudes towards HIV/AIDS: new evidence from a longitudinal study using fixed-effects analysis

The study presented here is an investigation of the importance of social interactions to perceptions of the risk of AIDS, and explores spousal communication about the AIDS epidemic in rural Malawi. A fixed-effects analysis based on longitudinal data collected in 1998 and 2001 shows that social interactions on the subject of HIV/AIDS have significant and substantial effects on respondents' perceptions of the risk of HIV/AIDS, even after controlling for unobserved factors that affect the selection of social networks. These effects are more complex than previously thought. The dominant mechanisms--social learning and social influence--are found to vary by sex and by region, because of regional variations in the marriage pattern and the resulting implications for the formation of local social networks. The conclusion of the study is that rather than fostering denial and inaction, social interactions are an important vector of change in the face of the HIV/AIDS epidemic.     

Unequal transitions: Selection bias and the compensatory effect of social background in educational careers

Previous studies have shown that social background inequality differs among educational transitions and it is stronger for those transitions that involve a higher risk of social demotion. This paper focuses on two processes that may account for part of the observed differences in social background inequality across educational transitions. First, it studies how the family of origin might compensate for a ‘false step’ in the early stage of young people's educational careers. This compensatory effect of social background can be described as the likelihood of having ‘a second chance’ for unsuccessful educational transitions. Second, it focuses on two unobserved factors that might potentially bias the effect of social background across educational transitions. These are the students’ unobserved cognitive and non-cognitive skills and their unobserved anticipated choices of dropping out of the education system. Two issues – the compensatory effect of social background and selection bias in educational transitions – are addressed by estimating a probit model with sample selection for the transition to post-compulsory education in Spain.     

Social Network Methodology in the Study of Disasters: Issues and Insights Prompted by Post-Katrina Research

Dynamic social networks, a key concept in modern social science research, are beginning to play a major role in understanding the ways in which individuals and communities respond to disasters. The authors of this paper review the relevant theory and research regarding how crises cause change in social networks, and how those changes may or may not facilitate recovery, as a function of the kinds of changes that occur. It applies the In/Out/Seeker/Provider (IOSP) framework to identify categories in which we might study disasters and the impact both on the networks and the impacts to the networks. This paper details options for applying social network analysis to research of both pre- and post-disaster settings and concludes by framing a research agenda for the future study of the dynamics of network change following a disaster.     

中国农民工的社会网络与性别偏好——基于深圳调查的研究

文章利用西安交通大学人口与发展研究所2005年中国深圳市农民工调查数据,基于社会网络理论定量研究了农民工的性别偏好现状及其影响因素。研究发现流动后农民工的生育观念与行为仍具有明显的男孩偏好特征;社会网络因素、流动因素和个体因素在一定程度上对农民工的男孩偏好观念与行为产生了影响。本文的研究结果对于理解中国城镇人口出生性别比偏高的现象和原因有重要作用。     

Quality of Social Networks Among UK Chinese

The present study examines factors affecting the quality of social networks of Chinese in the UK, in relation to network size and perceived respect gained from social network. The study further explores the role of social networks in relation to the social norms of helping and helping behaviour. Two hundred and eleven British Chinese participants recruited from Chinese health and community centres across the United Kingdom completed a quantitative questionnaire. The 38-item instrument consisted of four main domains: health and functioning; social functioning; volunteerism; and demographics. Findings revealed an association between social participation and social network size. High levels of trust in family members was found to be negatively associated with social network size, implying that strong family relations is a hindrance to social network size among British Chinese participants. More research is needed to further explore social networks of the British Chinese and the implications that this may have on use of services and social participation.     

A fixed-effects multilevel analysis of how community family structure affects individual mortality in Norway

By using register data for the entire Norwegian population aged 50-89 in the period 1980-1999, during which there were about 720,000 deaths, I estimate how the proportions of persons who were divorced or never married in the municipality affected all-cause mortality, net of individual marital status. The data include individual histories of changes in marital status and places of residence, providing a rare opportunity to enter municipality fixed effects into the model, thereby capturing the time-invariant unobserved factors at that level. The positive health externality of marriage that is suggested in the literature is supported by some of the estimates for women. Other estimates--especially those for men--point in the opposite direction. One possible interpretation of these findings is that social cohesion is perhaps not as beneficial for people's health as often claimed, at least not for both sexes. Alternatively, the results may reflect that marriage perhaps undermines rather than strengthens social cohesion, or that other mechanisms are involved-for example, those that are related to people 's perceptions of their health relative to the health of others. Estimates from models without such municipality fixed effects are markedly different, but these also shed doubt on the notion that a high proportion of unmarried persons generally increases individual mortality.     

The Quality of Social Networks: Its Determinants and Impacts on Helping and Volunteering in Macao

Pro-social behaviors serve essential societal functions. This study examines the factors affecting the quality of social networks, in terms of network size and perceived respect. It further explores the role of social networks in enhancing helping intention and helping behaviors. Eight hundred and eighty people were randomly interviewed by phone. Results indicated that the level of social participation, trust, and social identification were positively related to the quality of the social networks. A better social network was related to a higher level of helping intention and longer hours of volunteer works.     

Types of Personal Social Networks of Older Adults in Portugal

This study presents and discusses a three-dimensional typology for personal social networks of Portuguese older adults. We used a K-means cluster analysis of structural, functional and relational-contextual variables of the networks of 612 participants aged 65?+?(M?=?76?±?7.6), mostly women (63%). Four types of networks emerged: family networks, friendship networks, neighbourhood networks and institutional networks. The most frequent are family networks (61.8%), constituted by 94.6% of family ties, on average, attesting the familistic nature of the older persons’ networks in Portugal, followed by friendship networks (23.5%) and neighbourhood networks (11.9%). The less frequent type is the institutional network (2.8%), dominated by formal ties (M?=?59.3%). Sociographic profiles reveal that family networks are more likely to be held by middle-old focal subjects, married or widowed, and with children. Friendship and neighbourhood networks are held by young-old subjects with different marital status, many of them living alone, with a higher proportion of men with friendship networks. Institutional networks are held by old–old, widowed or single with no children. The presented typology contributes to understand social support needs and social isolation. The conclusions allow to anticipate social services’ demand trajectories and to propose intervention plans and social policy measures to promote the wellbeing of the older population.

     

Rethinking network capital: hospitality work and parallel trading among Chinese students in Melbourne

Drawing on an ethnographic study of Chinese female tertiary students’ work practices in Melbourne, Australia, this article engages critically with John Urry’s concept of network capital. I show how these students’ work practices link them both into relatively fixed, localized, diasporic employment networks in Melbourne’s Chinese restaurant sector; and into relatively mobile, transnational, digitally mediated trading networks in the micro-entrepreneurial activity of daigou or parallel trading: buying local goods on behalf of customers in China. Based on this case study, I develop three main inter-related claims. First, I argue that geographic and social mooring in place, as well as mobility, can generate benefit for individuals and groups, just as both fixity and mobility may generate disadvantage or risk. Second and relatedly, I propose that social capital cannot operate entirely independently of geography, as Urry’s proposal of network capital as a replacement for the concept of social capital implies. Third, through my development of the concept of ‘feminine network capital’, I show how network capital may take ‘weak’ and tactical, as well as ‘strong’ and strategic forms.     

Paternal Incarceration and Adolescent Social Network Disadvantage

Previous research has suggested that adolescent peers influence behavior and provide social support during a critical developmental period, but few studies have addressed the antecedents of adolescent social networks. Research on the collateral consequences of incarceration has explored the implications of parental incarceration for children’s behavioral problems, academic achievement, health, and housing stability, but not their social networks. Using network data from the National Longitudinal Study of Adolescent Health, I find that adolescents with recently incarcerated fathers are in socially marginal positions in their schools and befriend more-marginal peers than other adolescents: their friends are less advantaged, less academically successful, and more delinquent than other adolescents’ friends. Differences in network outcomes are robust to a variety of specifications and are consistent across race and gender subgroups. This study advances the social networks literature by exploring how familial characteristics can shape adolescent social networks and contributes to the collateral consequences of incarceration literature by using network analysis to consider how mass incarceration may promote intergenerational social marginalization.     

The influence of network mortality experience on nonnumeric response concerning expected family size: Evidence from a Nepalese mountain village

This article investigates the effects of sociometric network members' self-reported experiences with infant mortality on nonnumeric responses regarding expected family size among women in a small Nepalese community. The hypotheses tested include (1) that uncertainty about child survival, measured as average infant mortality across social networks, increases the likelihood of a nonnumeric response and (2) that this effect will be stronger when there is less variance in infant mortality experience within women a networks. The results suggest that nonnumeric response may be related to uncertainty about mortality derived through social learning.     

The density of social networks and fertility decisions: evidence from south nyanza district, kenya

Demographers have argued increasingly that social interaction is an important mechanism for understanding fertility behavior. Yet it is still quite uncertain whether social learning or social influence is the dominant mechanism through which social networks affect individuals' contraceptive decisions. In this paper we argue that these mechanisms can be distinguished by analyzing the density of the social network and its interaction with the proportion of contraceptive users among network partners. Our analyses indicate that social learning is most relevant with high market activity; in regions with only modest market activity, however, social influence is the dominant means by which social networks affect women's contraceptive use.     

The Social Context of Depression Symptomology in Sexual Minority Male Youth: Determinants of Depression in a Sample of Grindr Users

ABSTRACT

The purpose of this study was to understand which social context factors most influence depression symptomology among sexual minority male youth (SMMY). In 2011, 195 SMMY who use Grindr were recruited to complete an online survey in Los Angeles, California. Items focused on social context variables and depression symptomology. Hierarchical multiple regressions were conducted using an ecological framework. The best fitting model accounted for 29.5% of the variance in depression. Experiences of homophobia, gay community connection, presence of an objecting network member, and emotional support were found to be significant predictors. Past experiences of homophobia continuing to affect youth indicates the need for intervention to reduction of homophobia in youths’ social contexts. Interventions that teach youth skills to manage objecting viewpoints or help youth to reorganize their social networks may help to reduce the impact of an objecting network alter.     

Trust,Social Networks and Subjective Wellbeing in China

Using data from the World Values Survey, this study examines the associations among trust, social networks and subjective wellbeing in China. We address the endogenous nature of trust and social networks, and examine how these elements of social capital affect subjective wellbeing. We also explore the interplay between trust and social networks. Existing literature suggests that trust and social networks positively impact wellbeing, with one strand of the literature suggesting that in developed countries social capital is a stronger determinant of wellbeing than income. However, we find that this is not the case for China (a developing country) where the effects of trust and social networks on wellbeing are found to be relatively weaker compared to the effect of income.     

Effects of Social Networks on Health from a Stress Theoretical Perspective

This paper focuses on the relevance of quantitative and qualitative aspects of social networks in a health context. The study combined a stress theoretical perspective with theories of social support and social capital in order to investigate the mechanisms behind the association of social network size and self-rated health. The main research question in the study is whether social integration affects health by changing stressor appraisal (perceived stressor intensity or anticipated stressor burden). The study used a survey of an Austrian student sample (n = 246) to measure two models of hypothetical exposure to a potentially stressful event. The findings indicate that individuals with larger trust and support networks consider potential stressors to be less threatening, which leads to a reduced level of stress symptoms and a better subjective health condition. The influence of network size on stressor appraisal is fully mediated by the perceived social embeddedness that these ties induce.     

The consequences of unobserved heterogeneity in a sequential logit model

Cameron and Heckman (1998) established that a sequential logit model is more sensitive than many other models to the possible biasing influence of unobserved heterogeneity. This article proposes a method which allows researchers to find out how large this potential problem is for their data, their model, and their hypothesis of interest. This is done by proposing a set of scenarios for this unobserved heterogeneity, and showing how to estimate the effects of interest given these scenarios. The set of results from these scenarios give an indication of how sensitive the results are to assumptions regarding unobserved heterogeneity. This sensitivity analysis has been applied to a study of educational attainment in the Netherlands, and it showed that that the finding that the effect of father's education declined over transitions is quite sensitive to the assumptions made about unobserved heterogeneity, but that the finding that the effect of father's education declined over birth cohorts is more robust than is often feared.     

How Education Enhances Happiness: Comparison of Mediating Factors in Four East Asian Countries

Educational philosophers contend that education enhances autonomy and thus happiness, but empirical studies rarely explore the positive influence of education on happiness. Based on the previous finding that being better connected to the outside world makes people happy, this study examines the possibility that how well an individual connects to the world accounts for the positive association between education and happiness. Analyzing survey data from four East Asian countries, we find a common pattern among Japan, Taiwan and South Korea. Although both monetary and non-monetary factors play a role in explaining the relationship between education and higher reports of happiness, monetary factor is relatively unimportant whereas non-monetary factors, such as interpersonal network and degree of cosmopolitanism, account for a significant part of the association between education and happiness. China is exceptional due to its relative importance of personal income in accounting for happiness. In short, individuals who receive more education have more extensive social networks as well as greater involvement with the wider world; these life conditions are positively related with happiness. By enhancing one’s ability and propensity to connect with the wider social world, education may improve an individual’s subjective well-being.