Abstract We study how the opinions of a group of individuals determine their spatial distribution and connectivity, through an agent-based model. The interaction between agents is described by a Hamiltonian in which agents are allowed to move freely without an underlying lattice (the average network topology connecting them is determined from the parameters). This kind of model was derived usin...

generally, there are four approaches to social phenomena in soial sciences: the agent-based approach, the structural approach, the functional approach, and the critical realistic approach. these approachs, with respect to their specific interpretation of social phenomena, concentrate on the behavior of agents or on the structural charctristics or on both to arriv at explanations. this article i...

A model for network panel data is discussed, based on the assumption that the observed data are discrete observations of a continuoustime Markov process on the space of all directed graphs on a given node set, in which changes in tie variables are independent conditional on the current graph. The model for tie changes is parametric and designed for applications to social network analysis, where...

We consider the computational complexity of the market equilibrium problem by exploring the structural properties of the Leontief exchange economy. We prove that, for economies guaranteed to have a market equilibrium, finding one with maximum social welfare or maximum individual welfare is NP-hard. In addition, we prove that counting the number of equilibrium prices is #P-hard.

in defining the term social management strategy information, we can say, in short, that it is to organize social action aimed at solving problems of strategic policymaking and strategic planning of social services. direct service to the public not only means social welfare but also calls for constructive strategic policies in international atmosphere. smsi is the organized efforts of the societ...

the purpose of this paper was to measure the social capital of the medical students of mashhad medical sciences university in the place they lived (their neighborhood), and the factors affecting it. the statistical universe was the university with a total of 5383 students. the sample was 244. the sampling was done using the systematic classification method, the classes being the faculty and sex...