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Elena D. Concepción Martin K. Obrist Marco Moretti Florian Altermatt Bruno Baur Michael P. Nobis 《Urban Ecosystems》2016,19(1):225-242
Urban growth is a major factor of global environmental change and has important impacts on biodiversity, such as changes in species composition and biotic homogenization. Most previous studies have focused on effects of urban area as a general measure of urbanization, and on few or single taxa. Here, we analyzed the impacts of the different components of urban sprawl (i.e., scattered and widespread urban growth) on species richness of a variety of taxonomic groups covering mosses, vascular plants, gastropods, butterflies, and birds at the habitat and landscape scales. Besides urban area, we considered the average age, imperviousness, and dispersion degree of urban area, along with human population density, to disentangle the effects of the different components of urban sprawl on biodiversity. The study was carried out in the Swiss Plateau that has undergone substantial urban sprawl in recent decades.Vascular plants and birds showed the strongest responses to urban sprawl, especially at the landscape scale, with non-native and ruderal plants proliferating and common generalist birds increasing at the expense of specialist birds as urban sprawl grew. Overall, urban area had the greatest contribution on such impacts, but additional effects of urban dispersion (i.e., increase of non-native plants) and human population density (i.e., increases of ruderal plants and common generalist birds) were found. Our findings support the hypothesis that negative impacts of urban sprawl on biodiversity can be reduced by compacting urban growth while still avoiding the formation of very densely populated areas. 相似文献
2.
Concepción Carrasco Carpio Carlos García-Serrano Virginia Hernanz 《International migration (Geneva, Switzerland)》2020,58(3):235-257
This article aims to examine in depth the work trajectories of individuals over time, in order to provide a wider perspective of the employment history of immigrants compared to native people, by gender and for more than one decade (2005–2017) in Spain. We use microdata (cohort and multivariate analysis) from the Labour Force Survey and carry out a comparison for three groups: the Spanish born in Spain, the Spanish born abroad, and the non-Spanish born abroad. The results confirm that the non-Spanish born-abroad group is characterized by the existence of segmented assimilation. All foreigners suffered a loss in their work trajectories, since their employment rate in 2017 has as yet neither reached the level of the last years of the previous economic expansion nor the level of the previous cohorts at the same age. 相似文献
3.
María Concepción Pérez-Cárceles Juan Cándido Gómez-Gallego Juan Gómez-García 《Journal of applied statistics》2016,43(16):3030-3041
The aim of the paper is to demonstrate the appropriateness of an a priori analysis to determine the distributional assumption of the inefficiency term in a stochastic frontier model. To this end, theoretical distributions of estimated inefficiency were obtained when the inefficiency term is assumed to be distributed as a half normal and an exponential in a cost frontier model. Comparisons of such theoretical distributions with the respective cost inefficiency estimators using the goodness of fit test allow selecting the most appropriate distributional assumption. The application on three data sets of Spanish banking system in 2009 demonstrated the relevance of the research question. First, the results of estimated cost inefficiency with a half normal assumption are larger than with an exponential distribution significantly. Besides, half normal assumption was rejected and exponential was not rejected as the most appropriate distribution of inefficiency term in Spanish banking data set. However, the adjustment of saving banks data had been better with the former distribution than the latter. In the case of banks, any distribution results appropriate. To sum up, this work demonstrate that the distributional assumption on inefficiency term in Stochastic Frontier Approach must be established in a justified way, as it can significantly bias the results of estimated inefficiency and therefore, influences improving policies and strategies in the Spanish banking sector. 相似文献
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Projecting Long-Term Care Expenditure in Four European Union Member States: The Influence of Demographic Scenarios 总被引:1,自引:0,他引:1
Joan Costa-Font Raphael Wittenberg Concepció Patxot Adelina Comas-Herrera Cristiano Gori Alessandra di Maio Linda Pickard Alessandro Pozzi Heinz Rothgang 《Social indicators research》2008,86(2):303-321
This study examines the sensitivity of future long-term care demand and expenditure estimates to official demographic projections
in four selected European countries: Germany, Spain, Italy and the United Kingdom. It uses standardised methodology in the
form of a macro-simulation exercise and finds evidence for significant differences in assumptions about demographic change
and its effect on the demand for long-term care, and on relative and absolute long-term care expenditure. It concludes that
mortality-rate assumptions can have a considerable influence on welfare policy planning. Relative dispersion between country-specific
and Eurostat official estimates was found to be higher for the United Kingdom and Germany than for Italy and Spain, suggesting
that demographic projections had a greater influence in those countries.
相似文献
Joan Costa-FontEmail: |
6.
Concepción Varela-Neira Marisa del Río Araujo Emilio Ruzo Sanmartín 《European Management Journal》2018,36(5):660-670
Politics in the workplace is a reality of organizational life. Several studies have investigated the negative implications of perceived organizational politics on various work attitudes and performance measures but not on proactive performance. However, proactive performance is important in a sales context because salespeople operate in an uncertain environment, and some task aspects cannot be formalized. Moreover, there is still a need for research to analyse the psychological mechanisms that lead perceived organizational politics to cause negative reactions from employees as well as to provide new insights on the boundary conditions of this process. Therefore, we examine the effect of perceived organizational politics on proactive performance through a salesperson's trust in the sales manager, as well as the moderating role of the salesperson's experience.This study uses dyadic data from 192 salespeople and their sales managers from a range of industries. The model entails a moderated mediation process. Results support the proposed model. The findings contribute to the salesforce management literature by suggesting the need to consider the importance of perceived organizational politics and by aiding in the understanding of how and when it hinders proactive performance. 相似文献
7.
Audronė Virbickaitė Hedibert F. Lopes M. Concepción Ausín Pedro Galeano 《Econometric Reviews》2019,38(9):1007-1023
This article designs a Sequential Monte Carlo (SMC) algorithm for estimation of Bayesian semi-parametric Stochastic Volatility model for financial data. In particular, it makes use of one of the most recent particle filters called Particle Learning (PL). SMC methods are especially well suited for state-space models and can be seen as a cost-efficient alternative to Markov Chain Monte Carlo (MCMC), since they allow for online type inference. The posterior distributions are updated as new data is observed, which is exceedingly costly using MCMC. Also, PL allows for consistent online model comparison using sequential predictive log Bayes factors. A simulated data is used in order to compare the posterior outputs for the PL and MCMC schemes, which are shown to be almost identical. Finally, a short real data application is included. 相似文献
8.
OBJECTIVES: This article describes the process of developing a culturally based family intervention for Spanish-speaking Latino families with a relative diagnosed with schizophrenia. METHOD: Our iterative intervention development process was guided by a cultural exchange framework and based on findings from an ethnographic study. We piloted this multifamily group 16-session intervention with 59 Latino families in a randomized control trial. Data were collected on family- and client-level outcomes, and poststudy focus groups were conducted with intervention participants. RESULTS: Preliminary evidence indicates that the intervention is effective by increasing illness knowledge and reducing family burden. CONCLUSIONS: This work can provide a model for how to integrate cultural factors into psychosocial services and enhance interventions in real-world settings for culturally diverse populations. 相似文献
9.
ABSTRACTOfficial Spanish policy seeks greater gender equality by, among other things, encouraging men’s use of their legal rights to parental leave and requiring employers to implement equality plans. This article contains a first-ever analysis of the extent to which company equality plans are used to improve upon the legal provisions governing parental leave and whether those improvements actually encourage greater leave use by men, help to degender leave use and promote fathers’ co-responsibility for childcare. The improvements implemented by companies are analysed against a backdrop of economic crisis (2007-2016), during which public policy underwent no substantial change. An analysis of the gender equality plans in place among 107 ‘gender equality employers’ (GEEs) revealed that most included no enhancement of the existing legislation and only a few work organizations provided incentives for men to use leaves as part of their work-life balance strategies. Substantial progress in this regard can only be expected through increasing government provision of parental leave aimed at men and/or increasing government pressure on companies to encourage leave taking by men. 相似文献
10.
Elisenda Rentería Guadalupe Souto Iván Mejía‐Guevara Concepció Patxot 《Population and development review》2016,42(4):651-671
The impact of population structure on economic growth has been studied in recent decades using different methods to estimate the so‐called demographic dividend. Besides, education has been pointed out as a key factor in economic growth. We propose a decomposition of the demographic dividend, into age and education effects. We illustrate the potentialities of the method, deriving an application to Mexico and Spain over the period 1970‐2100. To that end, we estimate the National Transfer Accounts age profiles by schooling level and apply them to recently available population projections stratified by education level. Our results confirm the role of population age structure in the demographic dividend, but also reveal that education attainment can be even more crucial. Moreover, we find that how both age and education effects finally impact on economic growth depends to a great extent on the specific consumption and labor income age profiles in each country. 相似文献