نتایج جستجو برای: demography

تعداد نتایج: 10008  

Journal: :J. Economic Theory 2015
Michael Kuhn Stefan Wrzaczek Alexia Prskawetz Gustav Feichtinger

We examine within a life-cycle set-up the simultaneous choice of health care and retirement (together with consumption), when health care contributes to both a reduction in mortality and in morbidity. Health tends to impact on retirement via morbidity, determining the disutility of work, and through longevity, determining the need to accumulate retirement wealth. In contrast, the age of retirem...

2016
Sara Sheehan Yun S. Song

Given genomic variation data from multiple individuals, computing the likelihood of complex population genetic models is often infeasible. To circumvent this problem, we introduce a novel likelihood-free inference framework by applying deep learning, a powerful modern technique in machine learning. Deep learning makes use of multilayer neural networks to learn a feature-based function from the ...

Journal: :The Journal of animal ecology 2014
Amanda D Rodewald Rudolf P Rohr Miguel A Fortuna Jordi Bascompte

Ecological networks are known to influence ecosystem attributes, but we poorly understand how interspecific network structure affect population demography of multiple species, particularly for vertebrates. Establishing the link between network structure and demography is at the crux of being able to use networks to understand population dynamics and to inform conservation. We addressed the crit...

2013
James P W Robinson Maria Dornelas Alfredo F Ojanguren

Environmental variability can destabilize communities by causing correlated interspecific fluctuations that weaken the portfolio effect, yet evidence of such a mechanism is rare in natural systems. Here, we ask whether the population dynamics of similar sympatric species of a seabird breeding community are synchronized, and if these species have similar exceptional responses to environmental va...

Journal: :Population and Development Review 2013

Journal: :Canadian Studies in Population 2014

Journal: :Finnish Yearbook of Population Research 1995

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