Besides the structure of interactions within networks, also the interactions between networks are of the outmost importance. We therefore study the outcome of the public goods game on two interdependent networks that are connected by means of a utility function, which determines how payoffs on both networks jointly influence the success of players in each individual network. We show that an unb...

A migration network is modeled as a mutually beneficial cooperative agreement between financially-constrained individuals who seek to finance and expedite their migration. The cooperation agreement creates a network: “established” migrants contract to support the subsequent migration of others in exchange for receiving support themselves. When the model is expanded to study cooperation between ...

Cooperation enforcement in mobile ad-hoc networks has become a hot topic within the scientific community. Entities belonging to a mobile ad-hoc network are prone to selfishness because being cooperative and participating to basic network functions such as routing and packet forwarding involves resource consumption for the benefit of others. Different approaches have been proposed to promote coo...

Cancer develops after the acquisition of a collection of mutations that together create the cancer phenotype. How collections of mutations work together within a cell and whether there is selection for certain combinations of mutations are not well understood. We investigated this problem with a mathematical model of the Ras signaling network, including a computational random mutagenesis. Model...

This study examines the evolution of social networks within groups of six subjects playing a prisoners dilemma game. In each round subjects cannot discriminate in their action choice but can exclude others from their social environment. Four treatments are considered, varying the cost of exclusion and the information flow through the network. Observed cooperation levels strongly depend on the t...

Cooperation is observed widely in nature and is thought an essential component of many evolutionary processes, yet the mechanisms by which it arises and persists are still unclear. Among several theories, network reciprocity — a model of inhomogeneous social interactions — has been proposed as an enabling mechanism to explain the emergence of cooperation. Existing evolutionary models of this me...

We introduce an approach to iteratively design ‘small’ social networks used in software engineering together with methods analyzing the cooperation in the system. The degree of cooperation is measured by the emergence of coalitions and their stability over time. At the most abstract level, which we call the coalition view, coalitions are abstract entities that may dominate or attack other coali...

S ocial networks are ubiquitous in our internet-dominated culture, and the new virtual social networks have a lot in common with traditional social networks (e.g., friends and colleagues). In all cases, it is important who interacts with whom. Lately, there has been much theoretical and empirical work on how the behavior of individuals can be influenced by their social ties and how ties are dis...

In this paper we study learning and cooperation in repeated prisoners’ dilemmas experiments. We compare interaction neighbourhoods of different size and structure, we observe choices under different information conditions, and we estimate parameters of a learning model. We test robustness of the estimator. We find that naive imitation, although a driving force in many models of spatial evolutio...

Sensor networks can be used in many types of environments. The environmental monitoring is one of the most used. Communications in sensor networks should be as efficient as possible and collaborative methods can enhance their performance. In this work, we propose a monitoring group-based sensor network which uses the cooperation between groups. When a group detects an event, it warns the alert,...