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Mobile ad hoc networks rely on cooperation to perform essential network mechanisms such as routing. Therefore, network performance depends to a great extent on giving participating nodes an incentive for cooperation. The level of trust among nodes is the most frequently used parameter for promoting cooperation in distributed systems. There are different models for representing trust, each of which is suited to a particular context and leads to different procedures for computing and propagating trust. The goal of this study is to analyze the most representative approaches for mobile ad hoc networks. It aims to obtain a qualitative comparison of the modeling approaches, according to the three basic components of a trust model: information gathering, information scoring and ranking, and action execution.

The paper identifies the different tasks required by a trust system and compares the way they are implemented when the system model itself is based on information theory, social networks, cluster concept, graph theory and game theory. It also provides a common nomenclature for the models. The study concentrates exclusively on the trust models themselves, without taking into account other aspects of the original articles that are beyond the scope of this analysis.

The study identifies the main components that a trust model must provide, and compares the way they are implemented. It finds that the lack of unity in the different proposed approaches makes it difficult to conduct an objective comparison. Finally, it also notices that most of the models do not properly manage node reintegration.

The best of our knowledge, the study is the first that uses information scoring and ranking as classification key. According to this key, approaches can be classified as based on information theory, clusters and social network theory, and cooperative and non‐cooperative game theory. It also provides a common nomenclature for all of them. Finally, the main contribution of the paper is to provide an analysis of the most representative approaches and present a novel qualitative comparison.

Purpose – This chapter explores the m+eaning and significance of family business social responsibilities (FBSRs) using a metasystem approach, placing emphasis on the role of the family.

Design/Methodology/Approach – We employ a revelatory case study to investigate the complexity of family business (corporate) social responsibility. The main case, a German shoe retailer, is supplemented by other case illustrations that provide additional insights into FBSR.

Findings – To fully understand social responsibility in a family firm context, we need to include social initiatives that go beyond the actual family business as a unit. This FBSR connects family members outside and inside the business and across generations. As FBSR is formed through individual and family-level values, its character is idiosyncratic and contrasts the often standardized approaches in widely held firms.

Practical Implication – Family businesses need to go beyond the business as such when considering their engagement in social responsibility. Family ownership implies that all social initiatives conducted by family members, regardless if they are involved in the firm or not, are connected. This includes a shared responsibility for what family members do at present and have done in the past.

The purpose of this paper is to assess the associations between familism, frequency of physical contact, and marital satisfaction with mental health and well-being in a sample of 58 female marital partners of migrants who stayed in Mexico when their spouses migrated to the USA.

In total, 58 women were recruited through word of mouth in Sonora, Mexico. All women had their partner (the father of her children) living in the USA. Survey was administered face-to-face in participants’ homes.

Hierarchical regression analysis found that higher marital satisfaction and frequency of physical contact predicts mental health and well-being. However, familism was not associated with mental health and well-being for female partners of migrants.

This work is unique in that the current sample of female partners of migrants originate from the Sonora border region and has greater physical contact with their partner than most studies on transnational families assume. Approximately 40 percent of participants residing in the Sonora border state meet with their partners at least once a month. Additionally, this work provides an intimate face to the understanding of the very specific processes distinctive of inhabitants of border regions that are part of international migration. In order to promote health equity, health providers (e.g. counselors) need evidence-based information to tailor services to the specific needs of underserved Mexican transnationals.

The purpose of this paper is to discuss the transnational entrepreneurial activities of Colombian emigrants to the USA in the context of the Colombian government’s policies and initiatives aimed at encouraging and facilitating emigrants’ transnational entrepreneurship. It examines the profile of Colombian emigrants, the entrepreneurial transnational activities they pursue and the actual and potential role of the government in instigating and shaping these activities.

The paper analyzes data obtained from focus groups with migrant families and interviews with governmental officials and an expert researcher. It also evaluates secondary data sources relevant to the subject of the paper.

The impact of transnational activities of Colombian migrants upon Colombian economy and society is much lower compared with the activities of migrants in other countries and with the potential these activities could have for contributing to the economic development of Colombia. Possible causes of this include: the specific characteristics of the Colombian emigrant and entrepreneur profile, the fragmentation of transnational networks of the migrants and the lack of governmental strategies to support the development of transnational activities of migrants.

The paper contributes to the debates on emigrant–state relation through offering an analysis of migrant entrepreneurship, technology and knowledge transfer and investment activities of Colombian emigrants in the home country. It also provides recommendations for policy action and concrete government programs that might encourage greater involvement of Colombian migrants in high value-adding activities that could benefit the country’s development.

This paper aims to analyse the transnational activities of Colombian migrants in the USA; the reasons why migrants engage, or not, in these activities; and the impact of migrants’ transnational activities at the household, community and national levels.

This paper analyses data obtained from focus groups with migrant families and interviews with government officials and an expert researcher, as well as secondary data sources.

The main transnational activities in which Colombian migrants engage in are individually oriented, while participation in collective actions such as philanthropy or membership of political parties and hometown associations is limited. The impact of those activities varies when analysed at different levels. Overall, transnational activities of Colombian migrants can be seen as contributing to the perpetuation of south–north dependency, even if they help improve the socioeconomic situation of migrants and their families.

This paper contributes to the migration–development nexus debate by pointing to the significance of distinguishing the level of analysis (micro, meso and macro) when studying the impacts of transnationalism on development.