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Older people have different requirements from society and government, and frequently have differing values as well, such as for property and pension rights. [1] Older people are also more likely to vote, and in many countries the young are forbidden from voting. Thus, the aged have comparatively more, or at least different, political influence. [2]
Population ageing is the increase in the number and proportion of older people in society. Population ageing has three possible causes: migration, longer life expectancy (decreased death rate) and decreased birth rate. Ageing has a significant impact on society.
Population ageing is a shift in the distribution of a country's population towards older ages and is usually reflected in an increase in the population's mean and median ages, a decline in the proportion of the population composed of children, and a rise in the proportion of the population composed of the elderly.
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Population aging can potentially change American society as a whole. Many companies use a system, in which older, tenured workers get raises and benefits over time, eventually hitting retirement. [165] With larger numbers of older workers in the workforce, this model might be unsustainable.
Changes in the age structure of populations affects the way in which they distribute resources, along with a shift in expectations from different age strata. For example, as Japan's population has dramatically aged - with individuals aged 65+ accounting for approximately 25% of the population - the country has found itself with an unfavorable ...
Two types of statistics are used to classify personality change over the life span. Rank-order change refers to a change in an individual's personality trait relative to other individuals. Mean-level change refers to absolute change in the individual's level of a certain trait over time. [136]
The life expectancy of people with diabetes, which is 9.3% of the U.S. population, is reduced by roughly 10–20 years. [ 129 ] [ 130 ] People over 60 years old with Alzheimer's disease have about a 50% life expectancy of 3–10 years. [ 131 ]