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我们可以快速浏览一下最近生育率的下降，预期寿命的增加和显著的进化历程，从过去到现在，出生率和死亡率呈现显著波动的状态，真正描绘了全球年龄结构的重大转变。照这样发展下去，到2050年,世界上百分之二十二的人口将是60岁以上的老人，并且这个数量要远远大于预期，2020年的老龄人口预期将达到十亿人，而实质上的人口很有可能达到20亿。至于公民享年80岁以上(包括80岁)的人口数量,预计将会从1%增加到4%。

1.0 LITERATURE REVIEW

People today, live longer and often healthier lives owing to advances in various areas. It is a challenge to maintain and plan longer lives. Societal ageing hampers economic growth and issues such as sustainability of families, the states and communities’ capacity to provide for older people.

A quick look at the recent decline in fertility rates combined with increases in life expectancy and strong evolution from past fluctuations in birth and death rates depicts a really significant shift in the global age structure. So much so that by 2050, twenty two percent of the world’s population will be over the age of 60 or a figure reaching almost 2 billion compared to expectations for year 2020 of 1 billion. As for citizens aged 80 or above, statistics predict an increase from 1 to 4 percent.

It is undeniable that a country’s economic character will tend to change as its population ages since different age groups have different economic needs and productive capabilities. These changes can be measured by assuming a certain age-specific behaviour in relation to earnings, employment and savings and to assess the implications of modifications in the relative size of different age groups for these main contributors to the national income. However this tends to be misleading in the long run.

Normally, changing expectations about life cycle and demographic shifts are likely to entail behavioural changes and thereby influencing economic consequences of ageing. One good example is an individual who expects to live longer than his ancestors who will continue to work for longer and therefore start benefiting his savings at a later age.

2.0 WORLD AGEING SITUATION

Rapid reduction in infant mortality rates coupled with a dynamic fall in the death rate has resulted in a sharp rise in the proportion of older people in the population. This phenomenon of ageing population is fast becoming a worldwide problem. In 1950 there were about 200 million people above 60 years old in the world. This figure has risen some 616 million in the year 2000 and is expected to rise to 1.2 billion in 2025. A majority of them, about 72% of the total, will be living in developing countries. The projections indicate that the demographic transition will proceed much more rapidly in developing countries than it did previously in developed ones. The continuing fertility decline in many developing countries today is faster than the gradual decline experienced by the currently developed countries. In the developing countries, therefore, the pace of population ageing will exceed the pace in the developed countries. For example, it took France and Belgium more than 100 years to double the rate of the population over 60 from 9% 本论文由英语论文网提供整理，提供论文代写，英语论文代写，代写论文，代写英语论文，代写留学生论文，代写英文论文，留学生论文代写相关核心关键词搜索。