نتایج جستجو برای: demographic structure change
تعداد نتایج: 2167371 فیلتر نتایج به سال:
The study of the roles and functions of cities and their developments is an important question in modern geographic studies. The unbalanced spatial distribution of populations, irregular migration to metropolises and imbalances in the distribution of economic opportunities between regions have led to focus on the idea of medium-sized cities as one of the most effective approaches to planning ...
Current understanding of life-history evolution and how demographic parameters contribute to population dynamics across species is largely based on assumptions of either constant environments or stationary environmental variation. Meanwhile, species are faced with non-stationary environmental conditions (changing mean, variance, or both) created by climate and landscape change. To close the gap...
The identification of the characteristics that have an influence on the vaccination coverage of children and the determination of the pattern of such influence are very important since the government can reschedule the policy to immunize each and every child. This paper examines the factors that manipulate the vaccination coverage in terms of five major vaccines using the Bangladesh Demographic...
This paper proposes a microeconomic decomposition of the evolution of income inequality in Côte d’Ivoire in the 1990s, allowing to disentangle the simultaneous contributions of four types of phenomena to the evolution of the distribution of income: a change in the remuneration rates of the observed and unobserved earnings determinants, a change in the occupational preferences, and a change in t...
Many migratory birds have changed their timing of arrival at breeding grounds in response to recent climate change. Understanding the adaptive value and the demographic consequences of these shifts are key challenges. To address these questions we extend previous models of phenological adaptation to climate change under territory competition to include feedback from population dynamics, winter ...
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