Statistical Methods & Applications - Investigating the relationship between Gross Domestic Product and unemployment is one of the most important challenges in macroeconomics. In this paper, we... 相似文献
Social distancing, one of the measures adopted in the context of the COVID-19 pandemic, profoundly impacted on the lives of children. The consequences were, however, not homogenous. By focusing on the daily practices of 41 Mozambican children aged 3–10, we consider how differences in socioeconomic backgrounds led children to respond to the social restrictions in ways that made sense to them. Inspired by Abebe (2019), we identify how the interruptions of daily routines enabled specific instances of agency on children's part. These, we argue, produce new forms of continuity. 相似文献
Analysis of covariance (ANCOVA) integrates analysis of variance (ANOVA) and regression. The basic advantages of ANCOVA over ANOVA are: (1) generally greater power, and (2) reduction in bias caused by differences between groups that exist before experimental treatments are administered. ANCOVA has numerous possible applications in the evaluation of simulation output, especially where the values of covariates are not known until after the simulation experiment is completed. These covariates are uncontrolled experimental variables that influence the response but are themselves unaffected by the experimental factors. This paper provides an application of multiple analysis of covariance (MANCOVA) to a simulation experiment to determine whether an intermodal transfer and blending facility should add commodity handling and storage capacity. A discrete simulation model of the plant generated cash flows from several proposed capital projects. These cash flows indicated that capacity expansion was a prudent decision. However, when the treatment means for the various combinations of additional capacity were adjusted by MANCOVA for the same levels of operating volume and scheduling performance, the adjusted cash flows produced unacceptable financial returns. In this example, the increased precision of the MANCOVA model suggested that plant management should not invest in additional storage and commodity handling capacity. 相似文献
The yellow-legged gull Larus michahellis has undergone widespread colonization of the urban environment in the recent past. The first urban breeding gulls were recorded in the historical centre of Venice, Italy, in 2000, and by 2005 there were already 24 roof-nesting pairs, with this number increasing significantly over the last decade. In 2016, a new door-to-door garbage collection system was introduced in Venice to prevent the accumulation of rubbish in the streets and limit the trophic resources available for the species. This study provides an up-to-date estimate of the Venice yellow-legged gull urban population using distance sampling method. We also studied the effect of the new waste collection system on the species by comparing the population estimate before (2017) and after (2018) the full implementation of this change and by analysing the trend of individuals collected in the old town by the wildlife recovery service during 2010–2018. Results estimated ca. 430 breeding pairs in June 2018 showing a 36% decrease with respect to 2017. We also found a decrease in the number of 1-year-old birds and pulli collected by the wildlife recovery service starting from 2016, when the policy implementation began. Our data did not show a significant decrease in the overall number of individuals, suggesting that the new policy has a stronger effect on the breeding success of the species than on adult survival. This study emphasizes the importance of preventing rubbish accumulation in the streets as factor for reducing the abundance of urban yellow-legged gulls.
In Southern Europe, the migrant-in-the-family model has become a structural component of the elderly care regime. However, home care work is, by its nature, poorly reconcilable with private and family life. In fact, several studies have denounced the limitations on the right to private and family life that these workers suffer. In this article, I use the migrant home care assistants’ experience of conflicting temporalities around the work–life balance as lens through which to show the social unsustainability of the Italian model of home care assistant. This paper is based on broader research conducted between 2018 and 2020 in Padua (Italy) on Moldovan female migrant workers. As part of this research, 30 semi-structured interviews were collected with Moldovan workers employed – at the time of the interview or in the past – in home care for elderly people, in a live-in or live-out regime. 相似文献