The rise and popularity of online social networks is a recent phenomenon. In this study, we analyze the reasons and mechanisms behind the collapse of an online social network (OSN), iWiW. Significant cascading mechanisms have been identified in the pattern of abandoning the site at its peak of...

There are situations in which competitors ally to pursue a common objective. This simultaneous presence of cooperation and competition is called coopetition and we study it theoretically and experimentally in a group contest setup. More concretely, we analyze a group contest with a new sharing...

The aim of our study is to spell out and analyse the possibilities of data access, focusing on data that are used as an input of scientific research. We give a brief overview of the current legal background in Hungary. Based on normative economic analysis, we outline the main features of an...

Recent happiness studies by economists, sociologist and psychologists have produced many important new approaches and attitudes to focus less on objective variables and more on subjective well-being (SWB). Studies investigating life satisfaction (as a proxy of SWB) have identified strong...

According to international comparisons the Hungarians are extremely dissatisfied with their lives. Meanwhile Austria, with many cultural and historical similarities to Hungary, is in the forefront of the satisfaction lists. We have identified some of the important causes of Hungarian...

Recent happiness studies by economists, sociologist and psychologists have produced many important new approaches and attitudes to focus less on objective variables and more on subjective well-being (SWB). Studies investigating life satisfaction (as a proxy of SWB) have identified strong...

The starting point of this paper is a widely shared fundamental preference according to which Hungary should follow a fast, sustainable development path and catch up with the developed world in the foreseeable future. Questions raised in this paper are related to the instrumental preferences....

The possible exit of the United Kingdom from the European Union will have profound economic and political effects. Here we look at a particular aspect, the power distribution in the Council of the European Union. Since the Lisbon treaty the exit does not require new negotiations as the success...

The most important rule to determine payments in real-life bankruptcy problems is the proportional rule. Many bankruptcy problems are characterized by network aspects and default may occur as a result of contagion. Indeed, in financial networks with defaulting agents, the values of the agents'...

We provide a new modus operandi for the computation of the nucleolus in cooperative games with transferable utility. Using the concept of dual game we extend the theory of characterization sets. Dually essential and dually saturated coalitions determine both the core and the nucleolus in...