Mothers and Grandmothers on the Move: Labour Mobility and the Household Strategies of Moldovan and Ukrainian Migrant Women in Italy

This article contributes to the understanding of the westward migration of Eastern European women, by comparing Moldovan and Ukrainian women in Italy – the most popular destination for both groups – where they are mainly employed as domestic workers and home carers. Focusing on the differences in their trajectories in this labour sector, we discuss the significance of their age at emigration and their role within their families of origin. These have an impact not only on their mobility patterns, but also on their choices of employment and general socio‐cultural integration in the host country.     

‘Of equal or of more service’: black soldiers and the British Empire in the mid-eighteenth-century Caribbean

This essay examines the British military’s deployment of black soldiers in the West Indies during the War of Jenkins’ Ear and the Seven Years’ War. It analyzes two subjects that remain neglected despite the recent upsurge of interest in mid-eighteenth-century global imperial war: the vicissitudes of these conflicts in the Caribbean and their meaning for the lives of enslaved and free blacks. It contends that black soldiers’ martial exploits convinced British officials that they were essential weapons with which to secure and expand the Empire in the Atlantic: a conviction that led British officials to clash with southern mainland North American slaveholders during the War for American Independence.     

Body Image in Dyadic and Solitary Sexual Desire: The Role of Encoding Style and Distracting Thoughts

This study explored the link between body image and desire to engage in sexual activity (dyadic and solitary desire) in adult women living in a long-term couple relationship. Moreover, it considered two psychological factors that may underlie such a link: the occurrence of body-related distracting thoughts during sexual activity and encoding style (i.e., the tendency to rely on preexisting internal schemata versus external information at encoding). A total of 53 women (29 to 47 years old) in heterosexual relationships completed questionnaires assessing sexual desire (dyadic, solitary), body image, body-related distracting thoughts during sexual activity, and encoding style. Results showed that poor body image was associated with low dyadic and solitary sexual desire. Body-related distracting thoughts during sexual activity mediated the link between body image and solitary (but not dyadic) sexual desire. Finally, the mediation of body-related distracting thoughts between body image and solitary sexual desire was moderated by encoding style. A negative body image promoted the occurrence of body-related distracting thoughts during sexual activity, especially in internal encoders. Our study highlights the importance of body image, distracting thoughts, and encoding style in women’s solitary sexuality and suggests possible factors that may reduce the impact of those body-related factors in dyadic sexual desire.     

Responses to global challenges: trends in aid‐financed global public goods

Based on four decades (1973–2013) of OECD‐Development Assistance Committee aid to developing countries, this article aims to show aid‐financed global public goods trends, their changing composition and their main drivers. In particular, a constant increase in the share of aid‐financed global public goods and a shift towards weighted‐sum and weakest‐link global goods are observed. Economic conditions, imitation effects, global engagement and domestic spending result as the main drivers of donors’ demand for aid‐financed global public goods. Besides, a certain complementarity in the provision of global goods plays a role, especially in European countries and Japan, partially easing the prognosis for the collective action problems related to global goods     

Detecting a change in wealth concentration without the knowledge of the wealth distribution

Consumption is commonly used as a proxy for permanent income. We go a step further by establishing the link between the distribution of consumption and that of permanent income in terms of dominance orderings. We introduce two new dominance orderings, the Generalized Top Lorenz test and the related affluence ordering. If consumption is a concave function of permanent income, we get an indirect and robust method to detect a change in permanent income concentration when the full stream of income receipts along the life cycle is unknown and only consumption data are available. Our application on US data for the period 1980?C2002 points out the difficult start in life of people belonging to the ??Baby loser generation?? (people born in the sixties) with respect to the previous and following cohort.     

Identification of Local Causal Effects with Missing Outcome Values and an Instrument for Non Response

Even in randomized experiments the identification of causal effects is often threatened by the presence of missing outcome values, with missingness possibly being non ignorable. We provide sufficient conditions under which the availability of a binary instrument for non response allows us to non parametrically point identify average causal effects in some latent subgroups of units, named Principal Strata, defined by their non response behavior in all possible combinations of treatment and instrument. Examples are provided as possible scenarios where our assumptions may be plausible.     

Estimation,prediction and interpretation of NGG random effects models: an application to Kevlar fibre failure times

We propose a class of Bayesian semiparametric mixed-effects models; its distinctive feature is the randomness of the grouping of observations, which can be inferred from the data. The model can be viewed under a more natural perspective, as a Bayesian semiparametric regression model on the log-scale; hence, in the original scale, the error is a mixture of Weibull densities mixed on both parameters by a normalized generalized gamma random measure, encompassing the Dirichlet process. As an estimate of the posterior distribution of the clustering of the random-effects parameters, we consider the partition minimizing the posterior expectation of a suitable class of loss functions. As a merely illustrative application of our model we consider a Kevlar fibre lifetime dataset (with censoring). We implement an MCMC scheme, obtaining posterior credibility intervals for the predictive distributions and for the quantiles of the failure times under different stress levels. Compared to a previous parametric Bayesian analysis, we obtain narrower credibility intervals and a better fit to the data. We found that there are three main clusters among the random-effects parameters, in accordance with previous frequentist analysis.     

Assessing repeatability and reproducibility using hierarchical modeling: a case-study of distortion product otoacoustic emissions

We present how the repeatability and reproducibility of a measurement device can be estimated from a suitably defined hierarchical linear model. The methodology is illustrated using a collection of eight data sets which consist of the distortion product otoacoustic emission recordings collected from both ears of ten young Sprague-Dawley rats at different frequencies under eight different recording conditions. We formulate a model which extends the commonly used one-way random effects model (5) to account for an experimental setup that is more elaborated than the ones traditionally used in interlaboratory experiments. The fitted model is easily interpretable and furnishes as a by-product the frequencies at which the highest response level is achieved under the eight recording conditions. These values together with the repeatability and reproducibility limits of the protocols are crucial in contributing to the enhancement of the research capabilities on the possible causes of hearing impairment.     

Optimal experiments in the presence of a learning effect: a problem suggested by software production

In software engineering empirical comparisons of different ways of writing computer code are often made. This leads to the need for planned experimentation and has recently established a new area of application of DoE. This paper is motivated by an experiment on the production of multimedia services on the web, performed at the Telecom Research Centre in Turin, where two different ways of developing code, with or without a framework, were compared. As the experiment progresses, the programmers performance improves as he/she undergoes a learning process; this must be taken into account as it may affect the outcome of the trial. In this paper we discuss statistical models and D-optimal plans for such experiments and indicate some heuristics which allow a much speedier search for the optimum. Solutions differ according to whether we assume that the learning process depends or not on the treatments.     

Demographic and territorial characteristics of COVID-19 cases and excess mortality in the European Union during the first wave

Journal of Population Research - This article explores for a large number of countries in the European Union (plus the United Kingdom) the main demographic differentials in positive tested COVID-19...