The Experts below are selected from a list of 14739 Experts worldwide ranked by ideXlab platform

Leticia J Marteleto - One of the best experts on this subject based on the ideXlab platform.

  • stages of the demographic transition from a child s perspective family size cohort size and children s resources
    Population and Development Review, 2008
    Co-Authors: Leticia J Marteleto
    Abstract:

    This article provides a new characterization of stages of the demographic transition from the perspective of children competing for resources within families and cohorts. In Stage 1 falling mortality increases the size of both families and birth cohorts. In Stage 2 falling fertility overtakes falling mortality to reduce family size, but Population Momentum causes continued growth in cohort size. In Stage 3 falling fertility overtakes Population Momentum to produce declining cohort size. We apply our framework to census microdata for eight countries and to United Nations Population projections for a larger set of countries. The results suggest that most countries spend two to three decades in Stage 2, with declining family size offset by increasing cohort size. From the perspective of children aged 9-11, many countries enter Stage 3 between 2000 and 2010. Other countries, especially in Africa, will continue to experience increasing cohort size for several more decades. Copyright (c) 2008 The Population Council, Inc..

John Bongaarts - One of the best experts on this subject based on the ideXlab platform.

  • completing the demographic transition
    Population and Development Review, 1999
    Co-Authors: John Bongaarts, Rodolfo A Bulatao
    Abstract:

    This article proposes a procedure for quantifying the four components of future Population growth including fertility mortality migration and the current distribution of Population by age. This would also provide simple analytic expressions that yield to estimate the impact of alterations in factors from the four components. It aims to improve the conception concerning demographic factors that ascertain long-range Population growth. Studies documented that despite ongoing declines in fertility in several countries still the Population will be experiencing a period of rapid expansion by the end of the demographic transition. There are three causes of this growth identified and quantified. These include fertility above replacement level of two surviving children per woman; continuing declines in mortality; and Population Momentum resulting from a young age structure. This article concluded that Population Momentum is shown to be the main cause of future growth in most countries and regions.

  • Population policy options in the developing world
    Science, 1994
    Co-Authors: John Bongaarts
    Abstract:

    The Population of the developing world is currently expanding at the unprecedented rate of more than 800 million per decade, and despite anticipated reductions in growth during the 21st century, its size is expected to increase from 4.3 billion today to 10.2 billion in 2100. Past efforts to curb this growth have almost exclusively focused on the implementation of family planning programs to provide contraceptive information, services, and supplies. These programs have been partially successful in reducing birth rates. Further investments in them will have an additional but limited impact on Population growth; therefore, other policy options, in particular measures to reduce high demand for births and limit Population Momentum, are needed.

Rodolfo A Bulatao - One of the best experts on this subject based on the ideXlab platform.

  • completing the demographic transition
    Population and Development Review, 1999
    Co-Authors: John Bongaarts, Rodolfo A Bulatao
    Abstract:

    This article proposes a procedure for quantifying the four components of future Population growth including fertility mortality migration and the current distribution of Population by age. This would also provide simple analytic expressions that yield to estimate the impact of alterations in factors from the four components. It aims to improve the conception concerning demographic factors that ascertain long-range Population growth. Studies documented that despite ongoing declines in fertility in several countries still the Population will be experiencing a period of rapid expansion by the end of the demographic transition. There are three causes of this growth identified and quantified. These include fertility above replacement level of two surviving children per woman; continuing declines in mortality; and Population Momentum resulting from a young age structure. This article concluded that Population Momentum is shown to be the main cause of future growth in most countries and regions.

J Van Bavel - One of the best experts on this subject based on the ideXlab platform.

  • the world Population explosion causes backgrounds and projections for the future
    Facts views & vision in obgyn, 2013
    Co-Authors: J Van Bavel
    Abstract:

    At the beginning of the nineteenth century, the total world Population crossed the threshold of 1 billion people for the first time in the history of the homo sapiens sapiens. Since then, growth rates have been increasing exponentially, reaching staggeringly high peaks in the 20 th century and slowing down a bit thereafter. Total world Population reached 7 billion just after 2010 and is expected to count 9 billion by 2045. This paper first charts the differences in Population growth between the world regions. Next, the mechanisms behind unprecedented Population growth are explained and plausible scenarios for future developments are discussed. Crucial for the long term trend will be the rate of decline of the number of births per woman, called total fertility. Improvements in education, reproductive health and child survival will be needed to speed up the decline of total fertility, particularly in Africa. But in all scenarios, world Population will continue to grow for some time due to Population Momentum. Finally, the paper outlines the debate about the consequences of the Population explosion, involving poverty and food security, the impact on the natural environment, and migration flows.

Uche C Isiugoabanihe - One of the best experts on this subject based on the ideXlab platform.

  • demographic dynamics and development in nigeria
    African Population Studies, 2014
    Co-Authors: Akanni Ibukun Akinyemi, Uche C Isiugoabanihe
    Abstract:

    Nigeria is the most populous country in Africa and has a very high Population Momentum with an annual growth rate of 3.2 per cent per annum. This Momentum can be a panacea for development and economic growth if well harnessed. The focus of the article is to provide an overview of Population dynamics in Nigeria with a view to situating this within a broader context of contemporary Population and development discourse. The article benefited immensely from secondary data sources and desk review of evidence.