Social networks (SN) provide a great opportunity to help people interact with each other in different ways depending on the kind of relationship that links them. One of the aims of SN is to be flexible in the way one shares information, being as permissive as possible in how people communicate and disseminate information. While preserving the spirit of SN, users would like to be sure that their...

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The article analyzes the Brazilian welfare model according to elements central to the emergence and to the development of social protection systems. It is intended to discuss to what extent the absence or incompleteness of those elements weaken the model built in the 1988 Constitution. The general precepts of social protection are initially presented to characterize and discuss those issues as ...

On online social media, users join new online social networks (OSNs) to exploit variety of services while maintaining their old identities on other OSNs. A user maintains an identity on each OSN mentioning metadata (e.g. profile information) about her. Heterogeneity of metadata shared by user across OSNs leads to a problem of finding if two online identities on multiple OSNs belong to the same ...

This paper explores the relationship bet ween economics and the other social sciences and the implications for public policymaking. There are significant limitations inherent in applying the abstract and fragmentary conclusions Of economics directh to public policy matters without first resynthesizing those conclusions to the larger body of knowledge about human behavior and social structure. T...

Applied welfare analyses of redistributive systems nowadays benefit from powerful taxbenefit microsimulation programs combined with administrative data. Arguably, most of the distributional studies of that kind focus on social welfare defined as a function – typically inequality or poverty indices – of household equivalized income. In parallel, economic research has made considerable progress i...

This paper defines a new multilevel privacy model for social networks like Facebook. This model is user-friendly i.e. it does not require the users to alter some security settings. It provides the users with a privacy policy with a high expressive power. First, authorizations are based on the type of relationships that the users have between them. Second, relationships themselves are protected.

Social and economic change often involves self-reinforcing processes and dynamic synergies. Think for example of local clusters of economic development, such as Silicon Valley or the proposed ‘Northern Powerhouse’, where the UK government seeks to promote a self-sustaining process of transformation. How we understand these dynamics raises fundamental questions for social science and public policy.

Privacy management in online social networks (OSNs) is a major concern. However, the complexity of privacy policies and the plethora of privacy controls make it very difficult to assess whether the controls adequately implement the intended policies. This paper proposes a method to assess the degree of traceability between privacy policies and privacy controls in OSNs. The resulting analysis en...