Core/periphery scientific collaboration networks among very similar researchers

Empirical studies such as Goyal et al. (J Polit Econ 114(2):403–412, 2006) or Newman (Proc Natl Acad Sci USA 101(Suppl. 1):5200–5205, 2004) show that scientific collaboration networks present a highly unequal and hierarchical distribution of links. This implies that some researchers can be much more active and productive than others and, consequently, they can enjoy a much better scientific reputation. One may think that big intrinsical differences among researchers can constitute the main driving force behind these inequalities. Nevertheless, this model shows that, under specific circumstances, very similar individuals may self-organize themselves forming unequal and hierarchical structures.     

INFORMATION GATHERING IN ORGANIZATIONS: EQUILIBRIUM,WELFARE, AND OPTIMAL NETWORK STRUCTURE

We model an organization as a game in which all agents share a common decision problem and some level of coordination is necessary between individual actions. Agents have individual private information concerning the task they have to perform, and they share this private information through pairwise channels of communication. We analyze how this communication pattern, modeled by means of a network structure, affects individual behavior and aggregate welfare. In the unique equilibrium of this Bayesian game, each agent's optimal action depends on a properly defined knowledge index that measures how the aggregation of information helps him to infer higher‐order beliefs about other's information after communication. Adding communication channels is not always beneficial for the organization because it can lead to mis‐coordination. We single out the geometry of interagent communication links that the manager could implement in order to improve the organization's performance.     

Multifamily therapy in the community mental health network: A pragmatic randomized and controlled study

Multifamily therapy (MFT) is a psychotherapeutic group intervention for patients with severe mental disorders (SMDs) and their families. The present study is a multicenter, randomized, and controlled trial that analyzes the benefit of MFT during outpatient treatment. The recruited patients were randomly assigned to the experimental group (n = 26), which received 24 MFT sessions in addition to their treatment as usual (TAU), or to the control group (n = 29), which received only TAU (individual and family sessions). Six months after the inclusion in the MFT, the experimental group showed a significant decrease in number of visits to the psychiatric emergency services, number of psychiatric admissions, and the days of admission. The need for hospital care 6 months after recruitment was also lower in the experimental group compared to the control group. These results suggest that the implementation of MFT during outpatient treatment facilitates community management of people diagnosed with mental health problems.     

The emergence of social enterprises through the initiative of self-organized citizens: an analysis starting from Olson's approach to the logic of collective action

This article provides indirect empirical evidence with which to verify whether the logic of collective action maintained by Olson represents a sound theoretical approach to social enterprises. Our hypothesis is that, if a positive effect of participation in social enterprises on pro-social attitudes of members exists, when considering these organizations we should move from the approach proposed by Olson to the one proposed by Putnam, in the Tocqueville tradition. Overall, the existing empirical and experimental evidence seems to suggest that Putnam's approach to voluntary organizations is better able than Olson's to capture the organizational behavior of social enterprises, confirming that initiatives by self-organized citizens should be considered a possible convincing explanation for their emergence.     

Spanish version of the Parenting Sense of Competence scale: Evidence of reliability and validity

Perceived parenting competence influences parenting practices and is a decisive factor in child development and health. There is a lack of valid and reliable tools in Spain to measure perceived parenting competence. The objective was to adapt the Parenting Sense of Competence scale (PSOC) and analyse its psychometric properties in a sample of 600 mothers of children aged between 6 and 12 months old from Spain. The PSOC was translated into Spanish (PSOC‐E) using a standard forward‐ and back‐translation process. Internal consistency, factor structure, and comparisons between known groups and correlations with other variables were assessed. Confirmatory factor analysis confirmed the original two‐factor structure: satisfaction and efficacy. The PSOC‐E showed good internal consistency (Cronbach's α = .85). Perceived parenting competence was negatively associated (P < .01) with parental depression, fatigue, and parental stress and positively associated (P < .01) with dyadic adjustment. An equivalent Spanish version of the PSOC was obtained with good evidence of reliability and validity.     

Montée en qualification et modification de la répartition au sein de la chaîne de valeur mondiale du secteur de l’électronique

Le secteur de l’électronique repose sur une chaîne de production mondiale particulièrement complexe. Les auteurs s'appuient sur des données de la base WIOD pour la période 2000–2014 afin d'apprécier la contribution des pays à cette chaîne de valeur. Ils examinent notamment l'incidence de la crise financière mondiale de 2007–2008 sur son évolution et établissent une cartographie des interactions internationales. L’étude révèle une augmentation des délocalisations depuis la crise financière, la Chine et d'autres pays d'Asie de l'Est étant devenus les principaux pôles de création de valeur. Elle montre aussi que les technologies de production ont connu une transformation radicale, accompagnée d'une montée en qualification.     

Peer Pressure

We present a model where agents care about their neighbors' actions and can pressure them to take certain actions. Exerting pressure is costly for the exerting agent and it can impact the pressured agents by either lowering the cost of taking the action (which we call “positive pressure”) or else by raising the cost of not taking the action (which we call “negative pressure”). We show that when actions are strategic complements, agents with lower costs for taking an action pressure agents with higher costs, and that positive pressure can improve societal welfare. More generally, we detail who gains and who loses from peer pressure, and identify some circumstances under which pressure results in fully (Pareto) optimal outcomes as well as circumstances where it does not. We also point out differences between positive and negative pressure. (JEL: Z13, D62, C72, D85)     

Does satisfaction matter? A microeconomic empirical analysis of the effect of social relations on economic welfare

The paper studies the effect of social relations on individual economic welfare by explicitly considering the qualitative aspect of relations that characterize the social structure of personal contacts. It argues that important information is lost if only the density of the social network is considered. This proposition is tested using microdata representative of the entire Italian population. Two proxies for interpersonal relations at an individual level are considered: the number of voluntary associations joined and the satisfaction gained from relationships with friends. Both seem to have a positive effect on two indices of household economic welfare: a subjective index and an objective one. The subjective index is based on both the subjects’ personal assessment of their household general economic situation and financial difficulties in meeting certain expenditures. The objective index is calculated from objective data on the household's economic situation. The empirical results prove robust on considering a variety of control variables and using different econometric methods.     

Reflections on gains and losses: A 2 × 2 × 7 experiment

What determines risk attraction or aversion? We experimentally examine three factors: the gain-loss dichotomy, the probabilities (0.2 vs. 0.8), and the money at risk (7 amounts). We find that the majority display risk attraction for small amounts of money, and risk aversion for larger amounts. Yet the frequency of risk attraction varies according to the gain-loss dichotomy and the probabilities. Kahneman and Tversky studied gain-loss reflections. We submit that a reflection can be decomposed into a translation and a probability switch. We find significant translation and switch effects, which are of comparable magnitude, a result that is equidistant from the diverging two popular views inspired by Prospect Theory: the gain-loss asymmetry, and the fourfold pattern.