The Impact of School Closures on Learning and Mental Health of Children: Lessons From the COVID-19 Pandemic.

To curb the spread of the coronavirus, almost all countries implemented nationwide school closures. Suddenly, students experienced a serious disruption to their school and social lives. In this article, we argue that psychological research offers crucial insights for guiding policy about school closures during crises. To this end, we review the existing literature on the impact of school closures during the COVID-19 pandemic on children's learning and mental health. We find that the unprecedented scale and length of school closures resulted in a substantial deficit in children's learning and a deterioration in children's mental health. We then provide policy recommendations on how to ensure children's learning and psychosocial development in the future. Specifically, we recommend that more attention should be paid to students from marginalized groups who are most in need of intervention, evidence-informed and personality-tailored mental-health and social- and emotional-learning programs should be implemented in schools, and generational labels should be avoided.

Helpful or Harmful? The Role of Personality Traits in Student Experiences of the COVID-19 Crisis and School Closure.

Little is known about the individual differences in student experiences and expectations of the COVID-19 crisis and the resulting school closures. Yet, as the crisis may have uniquely impacted students, knowledge about their personalities is highly relevant. In a sample of 347 Flemish students, this study explored the association between personality traits and differences in responses to the crisis. The Big Five personality traits of students were assessed in January 2020, prior to the COVID-19 outbreak. Students were reassessed in June 2020 with a set of items related to well-being, remote learning, and family and social life. The results suggested that more conscientious students (showing a better perception of remote learning) and more open students (considering the period as an opportunity to learn new skills) adjusted well to the changes induced by the crisis. On the contrary, students high in neuroticism (showing higher stress levels) were harmed.

Sugar rush or sugar crash? Experimental evidence on the impact of sugary drinks in the classroom.

Sugary drinks in schools have been demonized for their potential long-term contribution to rising obesity rates. Surprisingly, there is only little evidence on the immediate effects of sugary drinks in schools. This paper provides experimental evidence on the in-class effects of sugary drinks on behavior and student achievement. We randomly assigned 462 preschool children to receive sugary drinks or artificially sweetened drinks and collected data before and after consumption. Our findings suggest that the consumption of one sugary drink induces an initial "relaxing" effect for boys, before making them more restless. Girls' behavior is not significantly affected. We find a negative effect on student achievement for boys and a positive effect for girls. We show the robustness of the results across two field experiments.

Does residential mobility improve educational outcomes? Evidence from the Netherlands.

This paper explores the impact of residential mobility on educational outcomes. By considering a large Dutch city with substantial internal residential mobility, we examine how residential mobility influences the decision of students to drop out of school. The paper exploits a rich administrative dataset with extensive information on educational, individual, family, housing and moving characteristics of students. It combines a matching design with a multivariate regression analysis, such that the evaluation draws on a well-comparable control group for the treated students. Accounting for individual, family, educational, neighborhood and housing characteristics, as well as for school and year fixed effects, we observe that residential mobility increases the probability of school dropout in the first few years after moving. The estimated effect changes, however, to a lower risk of early school leaving after an initial period, and then changes again to a higher risk after 6years. This effect remains, regardless the level of education the students attended, or whether the student moves to a better or a worse neighborhood.

To publish or not to publish? On the aggregation and drivers of research performance.

This paper presents a methodology to aggregate multidimensional research output. Using a tailored version of the non-parametric Data Envelopment Analysis model, we account for the large heterogeneity in research output and the individual researcher preferences by endogenously weighting the various output dimensions. The approach offers three important advantages compared to the traditional approaches: (1) flexibility in the aggregation of different research outputs into an overall evaluation score; (2) a reduction of the impact of measurement errors and a-typical observations; and (3) a correction for the influences of a wide variety of factors outside the evaluated researcher's control. As a result, research evaluations are more effective representations of actual research performance. The methodology is illustrated on a data set of all faculty members at a large polytechnic university in Belgium. The sample includes questionnaire items on the motivation and perception of the researcher. This allows us to explore whether motivation and background characteristics (such as age, gender, retention, etc.,) of the researchers explain variations in measured research performance.

Regulatory structures and operational environment in the Portuguese waste sector.

This research computes the influence of the operational environment on the efficiency of the Portuguese urban solid waste services. A sample of 29 solid waste utilities encompassing the whole continental country was used for this purpose. Particularly, we apply the non-parametric double bootstrap model to estimate the effect of various explanatory factors on robust data envelopment analysis estimates. In general, we find a significant influence of the environmental context on the solid waste utilities' performance. The environmental context is characterized by gross domestic product per capita, distance to treatment facilities, population density, regulation, type of management, composting and incineration services.