Given a set of attributed subgraphs known to be from different classes, how can we discover their differences? There are many cases where collections of subgraphs may be contrasted against each other. For example, they may be assigned ground truth labels (spam/not-spam), or it may be desired to directly compare the biological networks of different species or compound networks of different chemi...

During the past three decades, an estimated 200 million rural residents have moved to urban centers in China. They are "sojourners" in the cities and maintain close ties with their home communities, which we term trans-local ties. This paper examines the relationship between migrants' social ties and their mental health, and contrasts the trans-local ties with migrants' ties in the receiving co...

Preventive interventions focus on reducing risk and promoting protective factors in the child as well as their cultural ecologies (family, classroom, school, peer groups, neighborhood, etc). By improving competencies in both the child and their contexts many of these interventions promote resilience. Although there are now a substantial number of preventive interventions that reduce problem beh...

The neighborhood has had a long history in Iranian urbanization. Since urban plans wereintroduced by the authorities to shape urban development in Iran half a century ago, the concept of Iranian traditional neighborhood has been neglected gradually. The concept of neighborhood has not found the appropriate status in urban design and planning yet. One of the main reasons is that academics, profe...

From a social capital perspective, this article investigates how entrepreneurs in new ventures utilize their managerial ties (consisting of ties with other firms and ties with government) to capture opportunity. We also explore the moderating role of organizational learning (via exploratory learning and exploitative learning) in this process. Drawing on a sample of 159 new ventures, we find tha...

Social networks are important for finding jobs, but which ties are most useful? Granovetter (1973) suggested that “weak ties” are more valuable than “strong ties,” since strong ties have redundant information, while weak ties have new information. Using six million Facebook users’ data we find evidence for the opposite. We proxy for job help by identifying people who eventually work with a pre-...

The evidence suggests that trust is an important determinant of health. Trust tends to be lower in low-income and minority individuals, who already suffer from worse health. Therefore, it is particularly important to investigate the predictors of trust in disadvantaged individuals. In this article we use multilevel models to investigate the individual and neighborhood predictors of trust in Mex...

This paper adds evidence structure to standard models of belief, in the form of families of sets of worlds. We show how these more fine-grained models support natural actions of “evidence management”, ranging from update with external new information to internal rearrangement. We show how this perspective leads to new richer languages for existing neighborhood semantics for modal logic. Our mai...

In this paper we propose a general variable neighborhood search approach for the balanced location problem. Next to large shaking neighborhoods, the embedded variable neighborhood descent utilizes three neighborhood structures that focus on different solution aspects. By a computational study, we show that this VNS outperforms existing methods with respect to average solution quality and stabil...

This note proposes various axiomatizations of contingency logic under neighborhood semantics. In particular, by defining a suitable canonical neighborhood function, we give sound and complete axiomatizations of monotone contingency logic and regular contingency logic, thereby answering two open questions raised by Bakhtiari, van Ditmarsch, and Hansen. The canonical function is inspired by a fun...