Opting in to Opt out? Emigration and Group Participation in Albania

The objective of this paper is to determine whether the participation in social organizations represents a complement or a substitute with respect to international emigration. To address this research question, an instrumental variable approach is used, as group participation and international migration are potentially jointly determined. This is the case if the family considers emigration and group participation as alternative strategies to cope with uncertainty or a liquidity need, or alternatively when the family decides to invest in group participation in order to gain information helpful to emigrate. The results of the empirical estimation reveal that families participating in social organizations are more likely to migrate internationally and therefore social networks act as a complement for emigration. This may indicate that families recourse to social networks in order to collect important information that facilitates international migration.     

Sharing of Resources Within the Family and the Economics of Household Decision Making

Over the last 3 decades, economic models have been developed that recognize that potentially conflicting interests may shape household decisions and the sharing of resources within families. This article provides an overview of how decision making within households has been modeled within economics, presents the main benefits and limitations of those models, and critically assesses their usefulness to researchers from other disciplines interested in the within‐ household distribution of resources. The main focus is on the theory, empirical application, and results of the currently dominant collective models, but the authors also look at developments that led up to them and some subsequent extensions and alternative approaches. Given the weight placed by policymakers and others on economic and quantitative evidence, it is incumbent on researchers of all disciplines to understand the achievements and limitations of the models used, explicitly or implicitly, to produce such evidence and the assumptions that lie behind them.     

Comentario

Resumen

Presentamos una nueva escala para medir el estrés de aculturación de los autóctonos ante la inmigración, concretamente sudamericana. Hemos partido del concepto de amenaza percibida tomado de la Teoría Integrada de la Amenaza (Stephan y Stephan, 1996). Un análisis de componentes principales realizado con una muestra de 770 participantes ofrece una estructura compuesta por dos dimensiones: estrés de interacción y estrés por recursos. La escala final está formada por 16 ítems más tres de control de la deseabilidad social. Los análisis de fiabilidad han encontrado unos índices de consistencia interna muy satisfactorios, de.91 para la escala general de estrés de aculturación y de.91 y.88 para las dos subescalas. Los datos obtenidos permiten ofrecer un instrumento de medida que constituye una contribución en el estudio de los procesos de aculturación.     

Attachment‐facilitating interactions in non‐kin foster families

This study aims to analyse the interaction between children in foster care and their main caregivers during a microcoded co‐construction task, focusing on the verbal and non‐verbal behaviours that the adults use to promote a secure attachment in the child. It also examines how children and caregivers' socio‐demographic variables relate to the interaction. The sample is made up of 28 Spanish children between 4 and 9 years old in long‐term non‐kin foster care and their foster families. The building task was administered to 28 dyads, composed of the child and the main caregiver in each family. Our results showed that the caregivers' use of attachment‐facilitating behaviours was frequent during the interaction. Moreover, children tended to display a positive attitude when adults used these attachment‐facilitating behaviours. We also found some differences in the interaction according to the caregivers and children's age, the child's gender and the caregivers' satisfaction with the child's development. These results offer us a better understanding of the functioning of the adult–child relationships in foster families, which helps us make more efficient interventions to improve the caregivers' sensitivity towards the children's needs and difficulties.     

Geospatial Modeling of Containment Probability for Escaped Wildfires in a Mediterranean Region

Despite escalating expenditures in firefighting, extreme fire events continue to pose a major threat to ecosystem services and human communities in Mediterranean areas. Developing a safe and effective fire response is paramount to efficiently restrict fire spread, reduce negative effects to natural values, prevent residential housing losses, and avoid causalties. Though current fire policies in most countries demand full suppression, few studies have attempted to identify the strategic locations where firefighting efforts would likely contain catastrophic fire events. The success in containing those fires that escape initial attack is determined by diverse structural factors such as ground accessibility, airborne support, barriers to surface fire spread, and vegetation impedance. In this study, we predicted the success in fire containment across Catalonia (northeastern Spain) using a model generated with random forest from detailed geospatial data and a set of 73 fire perimeters for the period 2008–2016. The model attained a high predictive performance (AUC = 0.88), and the results were provided at fine resolution (25 m) for the entire study area (32,108 km²). The highest success rates were found in agricultural plains along the nonburnable barriers such as major road corridors and largest rivers. Low levels of containment likelihood were predicted for dense forest lands and steep-relief mountainous areas. The results can assist in suppression resource pre-positioning and extended attack decision making, but also in strategic fuels management oriented at creating defensive locations and fragmenting the landscape in operational firefighting areas. Our modeling workflow and methods may serve as a baseline to generate locally adapted models in fire-prone areas elsewhere.     

Modelling two types of heterogeneity in the analysis of student success

ABSTRACT

Student dropout is a worldwide problem, leading private and public universities in developed and underdeveloped countries to study the subject carefully or, as has recently been done, to analyse what drives student success. On this matter, different approaches are used to obtain useful information for decision-making. We propose a model that considers the enrolment date to the dropout or graduation date and also covariates to measure student success rates, to identify what the academic and non-academic factors are, and how they drive the student success. Our proposal assumes that there is one part of the population who is not at risk of dropping out, and that the part of the population at risk is heterogeneous, that is, we assume two types of heterogeneity. We highlight two advantages of our model: one is to identify the period of higher risk to dropout due to considering the academic survival time and the second is due to the inclusion of covariates that enable us to identify the characteristics linked to dropout. In this research, we also demonstrate the identifiability of the model and describe the estimation procedures. To exemplify the applicability of the approach, we use two real datasets.     

The Loss of Efficiency Estimating Linear Functions under Restrictions

This article is motivated by the problem of estimating contrast in a one-way ANOVA model with restrictions in the parameter vector. We prove that when the restrictions are given by a tree order or a simple order the MLE of some contrast has greater MSE than the unrestricted estimator. A similar behaviour of the MLE is exhibited in a general restricted setting given by a multivariate normal distribution with mean vector constrained to belong to a circular cone. The approach we use focuses on the central direction of the cones. These directions appear to have the greater MSE when the dimension of the restricted cone is big enough.     

Health related quality of life of women at the sixth week and sixth month postpartum by mode of birth

Background

Health-related quality of life of women in the postpartum period may depend on the mode of birth. However, previous findings are contradictory.

Delegating home care for the elderly to external caregivers? An empirical study on Italian data

We study care arrangement decisions in Italy, where families are increasingly delegating the role of primary caregiver to external (paid) people also for the provision of home care. We consider a sample of households with a dependent elderly person cared for either at home or in a residential home, extracted from a survey representative of the population of Italy’s Emilia-Romagna region. We investigate the determinants of a household’s decision to opt for one of the following three alternatives: the institutionalisation of elderly family members, informal home care, or paid home care. We estimate two model specifications, based on a simultaneous and a sequential decision process respectively, the results of which are fairly consistent. Disability related variables, rather than family characteristics, emerge as the main determinants of institutionalisation. On the other hand, household characteristics and socio-economic variables are more influential when it comes to choosing between informal and formal home care provisions.