Numbers, Facts and Trends Shaping Your World

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    Chapter 1: Main Factors Driving Population Growth

    When demographers attempt to forecast changes in the size of a population, they typically focus on four main factors: fertility rates, mortality rates (life expectancy), the initial age profile of the population (whether it is relatively old or relatively young to begin with) and migration. In the case of religious groups, a fifth factor is […]

  • report

    Above-and-Beyond Responses: Part 1

    A variety of views in regard to this issue are reflected in these big thinkers’ imaginings of what may happen by 2025. Look for losses in intellectual property and via ‘data pollution’ Vint Cerf, Google vice president and co-inventor of the Internet Protocol, responded, “Yes, while it has been predicted for a long time, there […]

  • report

    Appendix C: Methodology

    Overview The estimates presented in this report for the unauthorized immigrant population are based on a residual estimation methodology that compares a demographic estimate of the number of immigrants residing legally in the country with the total number of immigrants as measured by a survey—either the American Community Survey or the March Supplement to the […]

  • short reads

    For World Refugee Day, 5 long-term refugee trends

    Despite the ongoing conflicts in these countries, the number of refugees around the world is considerably less than it was two decades ago, numbering between 10 million and 12 million in recent years.

  • short reads

    The world gives Saudi Arabia poor marks on freedoms

    Americans are not the only ones who give Saudi Arabia poor marks on how the country treats its citizens: A median of just 18% across 39 countries surveyed said the Saudi government respects individual rights.

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