In this paper, I investigate the relationship between preference and judgment aggregation, using the notion of ranking judgment introduced inList andPettit (Synthese 140(1–2):207–235, 2004). Ranking judgments were introduced in order to state the logical connections between the impossibility theorem of aggregating sets of judgments proved in List and Pettit (Economics and Philosophy 18:89–110, ...

This paper considers trial-offer and freemium markets where consumer preferences are modeled by a multinomial logit with social influence and position bias. The social signal for a product i is of the form φi , i.e., its market share raised to power r. The paper shows that, when 0 < r < 1 and a static position assignment (e.g., a quality ranking) is used, the market converges to a unique equili...

A society is a complex system composed of individuals that can be characterized by their own attributes that influence their behaviors. In this study, a specific analytical protocol based on social network analysis was adopted to investigate the influence of four attributes (gender, age, matriline, and hierarchical rank) on affiliative (allogrooming) and agonistic networks in a non-human primat...

Grunt-like calls are present in the vocal repertoire of many group-living mammals and seem to facilitate social interactions between lower and higher-ranking members. The white-lipped peccary (Tayassu pecari) lives in stable hierarchical mixed-sex groups and like non-human primates, usually emits grunt-like calls following aggressive interactions, mainly during feeding contexts. We investigated...

BACKGROUND Poverty is multi dimensional. Beyond the quantitative and tangible issues related to inadequate income it also has equally important social, more intangible and difficult if not impossible to quantify dimensions. In 2009, we explored these social and relativist dimension of poverty in five communities in the South of Ghana with differing socio economic characteristics to inform the d...

This paper considers trial-offer markets where consumer preferences are modeled by a multi-nomial logit with social influence and position bias. The social signal for a product is givenby its current market share raised to power r (or, equivalently, the number of purchases raisedto the power of r). The paper shows that, when r is strictly between 0 and 1, and a staticpositio...

Social status hierarchies are ubiquitous in vertebrate social systems, including humans. It is well known that social rank can influence quality of life dramatically among members of social groups. For example, high-ranking individuals have greater access to resources, including food and mating prerogatives that, in turn, have a positive impact on their reproductive success and health. In contr...

Social grooming is a common form of affiliative behavior in primates. Biological market theory suggests that grooming can be traded either for grooming or other social commodities and services. When no other services are exchanged, grooming is predicted to be approximately reciprocated within a dyad. In contrast, the amount of reciprocal grooming should decrease as other offered services increa...

The recent rise of online communities significantly transforms the ways of social interactions and information exchange. Individuals’ voluntary community involvement contributes to growth and success of these online communities by creating economic and social values to individuals and to the community. Motivated by this phenomenon, this research investigates how community involvement impacts a ...

Previous research in multi-ethnic societies has shown that people rank, or form hierarchies of, the ethnic groups on the basis of social distance. Based on self-report data from a community sample (N1⁄4 150 non-psychology students), this study examined (1) the correspondence of ratings and rankings of six ethnic target groups among various subgroups of participants (Swedish and immigrant men an...