Results 21 to 30 of about 190,089 (145)

The long-term determinants of marital fertility in the developed world (19th and 20th centuries): The role of welfare policies

open access: yesDemographic Research, 2017
Background: Demographic transition theory was shattered dramatically as a result of the research carried out in the course of the Princeton European Fertility Project.
Jesús Sánchez-Barricarte
doaj   +1 more source

Genomic variation in a widespread Neotropical bird (Xenops minutus) reveals divergence, population expansion, and gene flow [PDF]

open access: yes(2015) Molecular Phylogenetics and Evolution 83: 305-316, 2014
Elucidating the demographic and phylogeographic histories of species provides insight into the processes responsible for generating biological diversity, and genomic datasets are now permitting the estimation of histories and demographic parameters with unprecedented accuracy.
arxiv   +1 more source

Persistent joblessness and fertility intentions

open access: yesDemographic Research, 2019
Background: The vast majority of demographic studies have approached and operationalised the notion of economic uncertainty using snapshot indicators. Hence, the complexity and diversity of individuals' employment careers were largely hidden.
Annalisa Busetta   +2 more
doaj   +1 more source

Contraceptive Use and Intent in Guatemala

open access: yesDemographic Research, 2010
Guatemala is characterized by low contraceptive use rates and one of the highest fertility rates in the Western Hemisphere. These rates are particularly extreme for the poorest segment of the population and for the indigenous population.
Kathryn Grace
doaj  

Towards real-time population estimates: introducing Twitter daily estimates of residents and non-residents at the county level [PDF]

open access: yesarXiv, 2020
The study of migrations and mobility has historically been severely limited by the absence of reliable data or the temporal sparsity of the available data. Using geospatial digital trace data, the study of population movements can be much more precisely and dynamically measured.
arxiv  

Genetic diversity in introduced populations with Allee effect [PDF]

open access: yesarXiv, 2013
A phenomenon that strongly influences the demography of small introduced populations and thereby potentially their genetic diversity is the Allee effect, a reduction in population growth rates at small population sizes. We take a stochastic modeling approach to investigate levels of genetic diversity in populations that successfully overcame a strong ...
arxiv  

Differences in Population Fertility Between Urban and Other Settlements in Serbia [PDF]

open access: yesДемографија, 2013
The aim of this paper is to investigate fertility levels and changes in reproductive behavior of the population in urban and other settlements in Serbia.
Uroš Živanović
doaj  

Sexual satisfaction among italian university students

open access: yesGenus, 2020
This paper examines the determinants of sexual satisfaction among Italian young men and women at the beginning of their adulthood, taking into account the different stages of sentimental and sexual transitions. We based the analyses on the data collected
Laura Terzera   +2 more
doaj   +1 more source

The McDonald-Kreitman Test and its Extensions under Frequent Adaptation: Problems and Solutions [PDF]

open access: yes, 2012
Population genomic studies have shown that genetic draft and background selection can profoundly affect the genome-wide patterns of molecular variation. We performed forward simulations under realistic gene-structure and selection scenarios to investigate whether such linkage effects impinge on the ability of the McDonald-Kreitman (MK) test to infer ...
arxiv   +1 more source

Whose job instability affects the likelihood of becoming a parent in Italy? A tale of two partners

open access: yesDemographic Research, 2012
We examine the likelihood of becoming a parent in Italy taking into account the employment (in)stability of both partners in a couple. We use data from four waves of the Italian section of the EU-SILC (Statistics on Income and Living Condition), 2004 ...
Daniele Vignoli   +2 more
doaj  

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