A review of the CTP distribution: a comparison with other over- and underdispersed count data models

The complex triparametric Pearson (CTP) distribution is a flexible model belonging to the Gaussian hypergeometric family that can account for over- and underdispersion. However, despite its good properties, not much attention has been paid to it. So, we revive the CTP comparing it with some well-known distributions that cope with overdispersion (negative binomial, generalized Poisson and univariate generalized Waring) as well as underdispersion (Conway–Maxwell–Poisson (CMP) and hyper-Poisson (HP)). We make a simulation study that reveals the performance of the CTP and shows that it has its own space among count data models. In this sense, we also explore some overdispersed datasets which seem to be more appropriately modelled by the CTP than by other usual models. Moreover, we include two underdispersed examples to illustrate that the CTP can provide similar fits to the CMP or HP (sometimes even more accurate) without the computational problems of these models.     

Implementation of customisation strategies in collaborative networks through an innovative Reference Framework

Consumer needs and expectations of specific target groups – such as elderly, obese, disabled or diabetic persons – are arising as challenging opportunities for European companies which are asked to supply innovative customised goods of high quality at affordable price. This is particularly true in the fashion as well as in the orthopaedic sector where there are many different competences to conjugate to offer dedicated products to the mentioned target groups. This paper aims at proposing a reference model to support companies in defining collaborative supply networks for customised production. In particular, this work describes the implementation of the developed model in a real case highlighting the changes implied at network level to address the need for fashionable and healthy products.     

Food Risks on the Web: Analysis of the 2017 Fipronil Alert in the Italian Online Information Sources

In the summer of 2017, several European Union Member States were involved in a food alert caused by the presence of fipronil pesticide residues in chicken eggs. The food alert became a major news and received wide coverage both in the mass media and on the Internet. This article describes a study that analyzed how the Italian online information sources represented the fipronil alert, using web monitoring techniques and both manual and automatic content analysis methods. The results indicate that the alert was amplified because general news media could represent the alert within the frame of a political scandal, and because different social actors exploited the case. However, online information sources correctly communicated that the risks for consumers were low, reporting mainly what was officially communicated by the Italian health authorities. The study provides empirical evidence on how the online information sources represent food risks and food alerts and offers useful indications for health authorities in charge of the public communication of food risks.     

Measuring ego-centered social networks on the web: Questionnaire design issues

Collecting survey data on ego-centered social networks is a difficult task, owing to the complex questionnaire format. Usually, the interviewer handles the dynamics of the question–answer exchange, motivates the respondent and ensures the proper recording of the data. Self-administered modes of data collection, especially web data collection, are more problematic, as the respondents are left alone with a complex and burdensome questionnaire. Therefore, questionnaire layout is crucial for ensuring cooperation and data quality. In this paper we examined three key components of the corresponding web questionnaire: the number of name boxes using a single name generator, question format for assessing alter characteristics (i.e. alter-wise vs. question-wise) and number of name interpreters (i.e. alter characteristics). The number of name boxes was found to be essential for the reported size of social networks and also for some aspects of data quality. Specific data quality effects were also found with respect to variations in question format, where question-wise format performed better than alter-wise. The number of name interpreters had a relatively minor effect. Suggestions for possible standardization of the web interface layout are also given, so that equivalence with other data collection modes can be established.     

Remittances in Ghana: Origin, Destination and Issues of Measurement

Few studies on remittances have focused on sub-Saharan Africa. This paper analyses a nationwide survey of 5,998 households to determine the characteristics of both internal and overseas remittances in Ghana. Particular attention is paid to the poverty-alleviation potential of remittances. Furthermore, this study uses a smaller scale pilot project with a matched sample of senders and receivers of remittances to identify some problems with using household-level surveys to assess the volume and impact of overseas remittances, and offers some suggestions as to how to handle these problems. The paper estimates that foreign remittances may be three times as large as Bank of Ghana estimates, bringing Ghana on par with large remittance receiving countries such as the Philippines and Mexico. The paper concludes that while foreign remittances are larger in value, locally sent remittances reach poorer segments of the population. Both foreign and local remittances are unevenly geographically distributed, being received more in the centre and southern regions than in northern Ghana where the poorest regions are. The paper argues a need to study multiplier effects of foreign remittances, as these can be large and eventually accrue to rural populations.     

A place for mobility in metaphors of youth transitions

ABSTRACT

Metaphors are central in the study of youth; in fact, it has been argued that ‘youth’ itself could be considered a metaphor. In a recent assessment of transition-related metaphors, Cuervo and Wyn [2014. “Reflections on the Use of Spatial and Relational Metaphors in Youth Studies.” Journal of Youth Studies 17 (7): 901–915.] have noted that such metaphors as ‘niches’, ‘pathways’, ‘trajectories’ and ‘navigations’, often contain an element of movement. However, it is still under-debated how we can systemically incorporate mobility into the study of young people to capture the precarity characterising their lives (a), but also heuristically link to metaphors used to describe the changing shape of careers of young people (b). Indeed, scholarship on ‘boundaryless careers’ and ‘peripatetic careers’ appear to have developed separately from the youth-related literature, albeit dealing in part with similar issues. Departing from Furlong’s work on metaphors in youth studies, this article interrogates potential for intertwining research lines within the growing debate on mobility in youth transitions. The article develops at a conceptual level; however it takes on Furlong’s legacy in the sense of contributing to a youth research agenda which is attentive to both the creation of new imaginative categories for the study of current conditions of youth, and the challenges that emerge in discursively positioning youth in society.     

Living in the Now: Decision-Making and Delay Discounting in Adolescent Gamblers

Several studies examining the relationship of affective decision-making and delay discounting in disordered gambling demonstrated that adult pathological gamblers differ from healthy controls on both reward-related decision tasks. To date no study analyzed the relative contribution of these variables in adolescent gambling. This study was designed to compare affective decision-making and delay discounting in gamblers and nongamblers Italian adolescents, controlling for alcohol consumption. A total of 138 adolescents took part in the research. Two equal-number groups, defined according to the scoring rules for the South Oaks Gambling Screen-Revised for Adolescents, were administered the Iowa Gambling Task (IGT), the Monetary Choice Questionnaire (MCQ), and the Alcohol Use Disorders Identification Test (AUDIT). Zero-order correlations among all variables revealed a moderate negative association between IGT and MCQ scores only in nongamblers group. Results of mixed-model ANOVAs indicated that, compared with nongamblers, adolescent gamblers performed worse on the IGT, showed steeper delay discounting, and scored significantly higher on the AUDIT. Results of logistic regression analysis indicated that IGT, MCQ, and AUDIT scores are all significant predictors of gambling status. This novel finding provides the first evidence of an association among problematic gambling, maladaptive decision-making, and steep delay discounting among adolescents, as already observed in adults.     

On a red line across Europe: butchers and rebellions in fourteenth-century Siena

As a result of the role played in urban uprisings and conspiracies in late medieval and early modern western Europe, the butchers’ trade has been one of the most intensively studied food-related occupations. Recent research on medieval butchers has shown a renewed interest in the topic. This article begins by presenting a review and synthesis of the historiography of butchers’ revolts in late medieval cities across western Europe. It then moves on to an analysis of the specific case of Siena, based on original primary research. The aim of the article is to show how Sienese butchers rebelled more than once during the fourteenth century and to examine why it was inevitable that they failed, despite the long-standing alliances they built with part of the educated elite. Indeed, social and political tensions within the guild forced a two-way split within the guild and its elites. These findings definitively call into question the traditional view of the cohesiveness of the butchers’ guilds in medieval Europe and their supposed marginalization in medieval society, advancing understanding of fourteenth-century Siena, of its enduring popular regime and, more generally, of late medieval urban society, politics and revolts. Moreover, such a case study has the potential to enable further comparative analysis across medieval and early modern Europe.