Population ageing is an enduring and global phenomenon which is the result of the demographic transition from high to low levels of fertility and mortality. Thi

The United States is in the midst of a major demographic shift. In the coming decades, people aged 65 and over will make up an increasingly large percentage of

Accurate, consistent and timely data on global trends in population age structure are critical for assessing current and future needs with respect to population

In sub-Saharan Africa, older people make up a relatively small fraction of the total population and are supported primarily by family and other kinship networks

Greater longevity is an indicator of human progress in general. Increased life expectancy and lower fertility rates are changing the population structure worldw