Search results for "Evidence"
showing 10 items of 1050 documents
Varying Definitions of Abundance and Incomplete Assemblages Challenge the Generality of the Interspecific Abundance—Distribution Relationships
2011
Empirical evidence does not fully support the universal nature of the positive interspecific abundance—distribution relationship. We have earlier documented a negative relationship for butterfly species in Finland, but recently our view was again challenged using a small subset of Finnish butterflies as apparent evidence. Here we scrutinize the critique and identify some general conceptual challenges in analyses of interspecific abundance—distribution relationships. We identify the common problem that the abundance—distribution studies include only a small subset of species, and thus reveal only sample characteristics, not overall patterns in complete assemblages. Small subsets of species a…
Virtual Reality and Anxiety Disorders Treatment: Evolution and Future Perspectives
2019
Virtual reality (VR) is a technology that allows the simulation of different real-life situations on a tridimensional computer-generated environment where the user can interact with the environment as if he/she were the real world. VR has potential as an exposure technique for treating anxiety disorders because VR and real objects have similar characteristics, which creates the illusion that the user is immersed and engaged with objects in the real world. Regarding the efficacy of using virtual reality exposure-based therapy (VR-EBT), for more than two decades, there has been sufficient empirical evidence regarding VR-EBT for treating anxiety disorders. Finally, this chapter ends with some …
The good-genes and compatible-genes benefits of mate choice.
2009
Genetic benefits from mate choice could be attained by choosing mates with high heritable quality ("good genes") and that are genetically compatible ("compatible genes"). We clarify the conceptual and empirical framework for estimating genetic benefits of mate choice, stressing that benefits must be measured from offspring fitness because there are no unequivocal surrogates for genetic quality of individuals or for compatibility of parents. We detail the relationship between genetic benefits and additive and nonadditive genetic variance in fitness, showing that the benefits have been overestimated in previous verbal treatments. We point out that additive benefits readily arise from nonaddit…
Public Policies to Promote Sustainable Transports : Lessons from Valencia
2021
Bicycling appears in the literature on urban mobility as a more sustainable transportation mode for future transportation, based on empirical evidence of the potential benefits of bicycling on the environment, society, and health. In this context, public interventions to promote and maintain bicycling as a sustainable practice and its positive effects are salient. This article reviews different cycling policies with respect to cycling facilities present in the literature and compares them with a case study in Valencia (Spain). We collected information on the public policies implemented in Valencia and the traffic intensity in bike lanes over detecting loops distributed around the city. The …
THE EXPECTED DEMOGRAPHIC INFLUENCES ON THE PROVISION OF EDUCATION SERVICES IN THE NEIGHBOURHOODS OF RIGA
2020
This paper discusses the spatial extent of population change and provides new insights into the relationships between demographic characteristics and the provision of education services in urban neighbourhoods of Riga. Thus, our empirical evidence confirms that the provision of social infrastructure is fundamentally dependent on the nature of demographic processes. The aim of this paper is twofold: to explore the spatial extent of changes in the number of pre-school and school-aged children in Riga, and to assess how the demographic change of particular age cohorts are associated with the provision of educational establishments at the neighbourhood level. Using available statistics and base…
The Informational Role of Thin Options Markets: Empirical Evidence of the Spanish Case (El Papel Informativo De Los Mercados De Opciones Estrechos: E…
2015
English Abstract: This study investigates the informational role of thin options markets, specifically the Spanish options market. Firstly, we examine the effect of options markets by analysing stock market reaction to earnings news, conditional on the availability of options markets. Secondly, we examine options-trading activity before the release of earnings news (including the announcement period). Results show that the impact on prices before the earnings release is significantly bigger when options trading is available. Moreover, the dissemination of earnings news is associated with significant unusual activity in the options market due to informed trading, especially when the earnings…
Transmisión entre mercados bursátiles y crisis financiera : el caso de España
2020
El trabajo analiza si la interrelación entre el mercado bursátil español y las bolsas de Estados Unidos, Reino Unido, Alemania y Francia se ha visto afectada y cómo por la reciente crisis financiera. Para ello, se estima un modelo VAR- GARCH bivariante, durante el período enero de 2000 a junio de 2012. Del modelo estimado se obtiene una medida del grado de integración de los mercados, el coeficiente de correlación condicional, y de éste se concluye que la crisis subprime produjo un efecto contagio entre los mercados bursátiles. Asimismo, la evidencia empírica permite concluir que en el período poscrisis ha aumentado la interrelación de la bolsa española con la francesa, reduciéndose la inte…
MAPPING COMPETENCY ACQUISITION IN HIGHER EDUCATION AND ITS INFLUENCES: A META-STUDY
2021
In the 10-year research program "Modelling and Measuring Competencies in Higher Education (KoKoHs)" that ran from 2011 until 2020, more than 100 theoretically sound models and corresponding tests were developed to analyze the level and development of students’ competencies. Using these newly developed assessments, generic and domain-specific competencies of more than 75,000 students at more than 350 German universities in numerous disciplines (e.g., economics, teacher education) were measured in 39 interdisciplinary collaborative KoKoHs projects. Method: In these measurements, a nationally and internationally unique database was created that contains information on the level, acquisition, a…
Trade Openness and the Skill Premium An Inverted - UU Relation?
2016
Relying on linked employer–employee data from the German manufacturing sector in 1996–2010, I study the relation between the share of exporting establishments and the skill premium within narrowly defined industries. I document that the skill premium tends to be higher in industries with a larger share of exporting establishments. However, once unobserved industry heterogeneity is taken into account, the empirical evidence suggests an inverted-‘U’ relation between the share of exporting establishments and the skill premium.
Healthy Teens @ School: Evaluating and disseminating transdiagnostic preventive interventions for eating disorders and obesity for adolescents in sch…
2019
Background The worldwide prevalence of overweight and obesity is at alarming levels. Nearly one in three children in Europe is overweight or obese. Disordered eating and body image concerns are equally widespread and increase risk for more chronic and severe weight-related problems. Research has shown that online interventions that address both healthy weight regulation and body image can reduce risk for eating disorders and obesity simultaneously and are feasible to implement in school settings. To date, evaluation and dissemination of such programs in Europe is scant. Methods The Healthy Teens @ School study is a multi-country cluster-randomized controlled trial (RCT) comparing the effect…