نتایج جستجو برای: demographic structure change
تعداد نتایج: 2167371 فیلتر نتایج به سال:
Previous studies, conducted mainly in Asian countries, have shown that women‘s empowerment is associated with contraceptive use, lower fertility, and longer birth intervals. Yet little is known about the association of women‘s empowerment with fertility desires in subSaharan African countries where overall fertility levels remain high. This study tries to fill this gap, exploring whether women‘...
Substantial changes in population size, age structure, and urbanization are expected in many parts of the world this century. Although such changes can affect energy use and greenhouse gas emissions, emissions scenario analyses have either left them out or treated them in a fragmentary or overly simplified manner. We carry out a comprehensive assessment of the implications of demographic change...
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...
This paper considers how increasing longevity and declining birth rates affect market entry endogenous productivity growth in a two-country model of industry location trade. Firm-level investment process innovation generates growth, with imperfect knowledge diffusion the larger country, measured by labor force size, has greater share relatively productive firms. In this framework, population ag...
Recurrent cycles of climatic change during the Quaternary period have dramatically affected the population genetic structure of many species. We reconstruct the recent demographic history of the coyote (Canis latrans) through the use of Bayesian techniques to examine the effects of Late Quaternary climatic perturbations on the genetic structure of a highly mobile generalist species. Our analysi...
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