Spatio-temporal patterns of population changes within and across countries have various implications. Different geographical, demographic and econo-societal factors seem to contribute to migratory decisions made by individual inhabitants. Focusing on internal (i.e. domestic) migration, we ask whether individuals may take into account the information on the population density in distant location...

Sexual eukaryotic organisms are characterized by haploid and diploid nuclear phases. In many organisms, growth and development occur in both haploid and diploid phases, and the relative length of these phases exhibits considerable diversity. A number of hypotheses have been put forward to explain the maintenance of this diversity of life cycles and the advantage of being haploid versus that of ...

Demography is the study of individuals as members of a population. The dynamics of a population are determined by collectively analyzing individual schedules of survival, growth, and reproduction. Together, these schedules are known as the vital rates of the population. The vital rates, along with dispersal, contribute to population structure, which refers to how the population is organized by ...

In this paper we examine the implications of future demographic change, particularly the size, composition, and racial/ethnic diversification of population, on obese adult population in Georgia and the economic costs associated with these obese adults from 2000 to 2040. The number of obese adults is projected to increase from 1.5 million in 2000 to 4.3 million in 2040, along with an increase in...

BACKGROUND Many studies compare the population dynamics of single species within multiple habitat types, while much less is known about the differences in population dynamics in closely related species in the same habitat. Additionally, comparisons of the effect of habitat types and species are largely missing. METHODOLOGY AND PRINCIPAL FINDINGS We estimated the importance of the habitat type...

This paper examines whether the Solow growth model is consistent with the international variation in the standard of living. It shows that an augmented Solow model that includes accumulation of human as well as physical capital provides an excellent description of the cross-country data. The paper also examines the implications of the Solow model for convergence in standards of living, that is,...

Yemen is among the poorest countries in the world, with a GDP per capita of US$460. It faces structural and policy constraints to achieve sustainable employment-generating growth and delivering the necessary public services to achieve the Millennium Development Goals (MDG) targets. The country is compounded by high population growth (about 3% per year) and the resulting young age distribution (...

The population size in almost all of the countries in the South and Central Asian region shows a significant increase in the last few decades. Nevertheless, during 19801990 and 1990-2000 decades, countries in South Asia experienced a significant decline in the average annual rate of population growth (Table 1). Afghanistan is the only exception showing an increase in the growth rate and its pop...

This paper examines whether the Solow growth model is consistent with the international variation in the standard of living. It shows that an augmented Solow model that includes accumulation of human as well as physical capital provides an excellent description of the cross-country data. The paper also examines the implications of the Solow model for convergence in standards of living, that is,...