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...

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...

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 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....

We show the existence of an upper bound for the number of blocks required to get from one imputation to another provided that accessibility holds. The bound depends only on the number of players in the TU game considered. For the class of games with non-empty cores this means that the core can...

Measuring risk can be axiomatized by the concept of coherent measures of risk. A risk environment specifies some individual portfolios' realization vectors and a coherent measure of risk. We consider sharing the risk of the aggregate portfolio by studying transferable utility cooperative games:...

While they use the language of game theory known measures of a priory voting power are hardly more than statistical expectations assuming voters behave randomly. Focusing on normalised indices we show that rational players would behave differently from the in-dices predictions and propose a...