Joint models for mixed categorical outcomes: a study of HIV risk perception and disease status in Mozambique

Two types of bivariate models for categorical response variables are introduced to deal with special categories such as ‘unsure’ or ‘unknown’ in combination with other ordinal categories, while taking additional hierarchical data structures into account. The latter is achieved by the use of different covariance structures for a trivariate random effect. The models are applied to data from the INSIDA survey, where interest goes to the effect of covariates on the association between HIV risk perception (quadrinomial with an ‘unknown risk’ category) and HIV infection status (binary). The final model combines continuation-ratio with cumulative link logits for the risk perception, together with partly correlated and partly shared trivariate random effects for the household level. The results indicate that only age has a significant effect on the association between HIV risk perception and infection status. The proposed models may be useful in various fields of application such as social and biomedical sciences, epidemiology and public health.     

Sequential Monte Carlo for rare event estimation

This paper discusses a novel strategy for simulating rare events and an associated Monte Carlo estimation of tail probabilities. Our method uses a system of interacting particles and exploits a Feynman-Kac representation of that system to analyze their fluctuations. Our precise analysis of the variance of a standard multilevel splitting algorithm reveals an opportunity for improvement. This leads to a novel method that relies on adaptive levels and produces, in the limit of an idealized version of the algorithm, estimates with optimal variance. The motivation for this theoretical work comes from problems occurring in watermarking and fingerprinting of digital contents, which represents a new field of applications of rare event simulation techniques. Some numerical results show performance close to the idealized version of our technique for these practical applications.     

Corporate social responsibility and corporate governance in Italian SMEs: the experience of some “spirited businesses”

The study proposes to individuate the relationship between social engagement, social statements and governance of SMEs. Does an adhesion to the philosophy and to the practices of CSR, which are reflected in a firm’s mission and accountability, positively influences its governance? If so, is this influence more or less significant for SMEs with respect to large-sized firms? This paper winds itself around these questions and describes the principle findings that have emerged from a qualitative investigation focused on a selected group of “cohesive” Italian SMEs, in which their management complies with both economic and social issues. The empirical study finds that the diffusion of CSR is tied above all to the entrepreneur’s values and orientation and to the company embeddedness to the local socio-economic environment. The concluding reflections trace the features of a territorial model of socially responsible orientation centered on the best practices of SMEs who are excellent examples of “spirited businesses” and are part of a network (which includes institutions, trade associations, non-profit organizations, etc.) that contributes to the diffusion of an orientation towards CSR and to sustainability across the territory.     

The role of grandparenting in early childcare and child outcomes

This paper examines the short and medium term impact of early childcare provision by grandparents and formal care settings on child cognitive outcomes, using data from the Millennium Cohort Study (UK). Compared with children placed in formal childcare, children cared for by their grandparents are better at naming objects, but perform worse on tests of basic concept development and non-verbal reasoning. These results mask strong heterogeneities. On the one hand, the positive association between grandparental care and child outcomes is stronger for children from more advantaged households; on the other, the negative association is only significant for those from more disadvantaged households. The results of OLS estimations used for our analysis are confirmed using panel methods and an instrumental variable approach.     

Post-Divorce Transfers and the Welfare of Mothers and Children in the United States

ABSTRACT In this paper we analyze the relationship between post-divorce private transfers (child support and alimony), mothers' economic independence and children's welfare using US data. Our empirical results show that mothers who receive child support and alimony from absent fathers are more likely to work and to spend a higher proportion of the income on child-related goods. We argue that the pattern of empirical results is consistent with there being significant externalities between parents even after divorce.     

Impact of support networks for breastfeeding: A multicentre study

Background

The rates of breastfeeding worldwide are slowly improving since 1996. Europe is still trailing behind the global breastfeeding incidence and prevalence rates. Thus, breastfeeding promotion, protection, prolongation and support have become an important challenge as breastfeeding sharply decreases in the first six months of life.

Professional discretion and length of work experience: what findings from focus groups with care managers in elder care suggest

ABSTRACT

Research has explored how care managers in elder care – who often function as ‘street-level bureaucrats’ – regard professional discretion. The way in which length of work experience affects care managers’ use of professional discretion remains, however, unexplored. This article present findings from 12 focus groups with 60 care managers. By bringing attention to how care managers experience the needs assessment process, this article sheds light on how these ‘street-level bureaucrats’ struggle when they try to balance their clients’ needs against institutional frameworks and local guidelines. Length of work experience seems to play a role in how care managers claim to use professional discretion. Experienced care managers describe how they deviate from the guidelines at times in order to create an increased scope of action in their decision-making process. Those with less time in the profession describe greater difficulties in this respect. Findings suggest that research should explore if length of work experience plays a role in the actual way in which care managers assess needs and make decisions. As such, they contribute to our understanding of how needs assessment processes are navigated by professionals while also pointing towards the nature of professional discretion in gerontological social work.     

EU post-accession Polish migrants trajectories and their settlement practices in Scotland

The presence and the apparent permanence of post-accession EU migrants in the UK is of significant interest to both academics and politicians. Studies have debated whether migration from new accession countries to the UK mark a new type of migration often described as ‘liquid’ and ‘open ended’, or whether these migrants will settle in the new destination countries. Based on a qualitative study of Poles who have lived in Scotland for at least six years, we observed four typologies of what we call migrants’ settling practices: (1) stayers, (2) over-stayers, (3) circular and transnational migrants and (4) economic migrants. The findings from this study demonstrate that Polish migrants do not have fixed ideas about the duration of their migration (in terms of a sense of permanence) but instead focus on diverse links, anchors or attachments in Scotland and Poland in describing their settling practices. Thus, the main contribution the article makes is to present an in-depth understanding of what settlement means from the perspective of migrants themselves. This paper concludes by providing a short comment on implications of the outcome of the Referendum on EU membership ‘Brexit’ in June 2016 on Polish migrants settling practices.