Network public goods with asymmetric information about cooperation preferences and network degree

We propose a game theoretical model of one-shot network public goods formalizing the ‘closure argument’ that cooperation is more frequent in denser groups or networks. Equilibrium analyses show that (i) an ‘inefficiency problem’ exists: players all preferring mutual cooperation need not all cooperate; (ii) in dyads, groups and networks with degree independence, first order stochastic dominance shifts of the distribution of cooperation preferences or the degree distribution (weakly) increases cooperation, and (iii) the latter result does not hold for networks with degree dependence. Hence the closure argument always holds in networks satisfying degree independence but not in other networks.     

BETWEEN BROADCASTING POLITICAL MESSAGES AND INTERACTING WITH VOTERS

Politicians across Western democracies are increasingly adopting and experimenting with Twitter, particularly during election time. The purpose of this article is to investigate how candidates are using it during an election campaign. The aim is to create a typology of the various ways in which candidates behaved on Twitter. Our research, which included a content analysis of tweets (n?=?26,282) from all twittering Conservative, Labour and Liberal Democrat candidates (n?=?416) during the 2010 UK General Election campaign, focused on four aspects of tweets: type, interaction, function and topic. By examining candidates' twittering behaviour, the authors show that British politicians mainly used Twitter as a unidirectional form of communication. However, there were a group of candidates who used it to interact with voters by, for example, mobilizing, helping and consulting them, thus tapping into the potential Twitter offers for facilitating a closer relationship with citizens.     

Poverty and Subjective Well-being in Mexico

There are two tendencies in the literatureregarding the relationship between income andsubjective well-being. The first tendencymaintains that there is a strong relationshipbetween these two variables, and that thepoorer the population, the more pronounced thisrelationship. The second tendency downplaysthis relationship, arguing that a largepercentage of happiness cannot be explained byeconomic variables. The objective of this studywas to compare the subjective well-being ofthree socioeconomic groups – extremely poor,moderately poor and not poor – and to discoverthe combination of subjective well-beingfactors that makes it possible to predict thesocioeconomic group to which subjects belong.Subjective well-being was measured by using aninstrument developed by Palomar Lever (2000) andconsisting of eleven related factors thatinquire into the subjects' satisfaction ineleven areas of life. The results indicatestatistically significant differences in nearlyall the subjective well-being factors inrelation to the socioeconomic group to whichsubjects belong, with the poorest subjectsreporting the least satisfaction. In additionsome differences were found in relation to sexand age. Also, low correlations were observedbetween income and subjective well-being in theextremely poor and moderately poor groups, withmore of these correlations in the first group,followed by the last. Finally, it was foundthat membership in the socioeconomic groups canbe predicted by a combination of subjectivewell-being factors such as satisfaction withone's recreational activities, socialsurroundings, personal development and couplerelationship.