Richer countries on average have lower fertility rates so as the world becomes richer fewer children are born.
Obama and his advisers do not care that Jewish fertility rates are the fastest rising in the world.
Fertility rates in America have plummeted, and they show no sign of inching up, despite what the Bureau assumes.
Western European countries have low fertility rates, below the replacement rate of 2.1.
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But the rock-bottom fertility rates in the tigers give the problem particular potency.
Properly accounting for demographics is always tricky since in theory folks can alter retirement ages, fertility rates, work-school balance, etc.
Until the mid-1980s, America and Europe also both had stable populations, declining fertility rates and growing numbers of old people.
In fact, they lower their fertility rates more slowly than the wealthy.
Where all these things are present, fertility rates tend to go up.
But for now it is firmly in place, and very low fertility rates still prevail, especially in the richest parts of the country.
Admittedly, Africa is lagging behind Asia by about 20 years, and the continent's fertility rates are still high, but the trend is clear.
With sensible policies and international support, these very poor countries could do themselves a huge favour by reducing fertility rates sharply through voluntary means.
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The idea was that if women had access to education and higher salaried jobs, they would choose to have smaller families, thus lowering fertility rates.
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Higher fertility rates and immigration produce not only a larger population but a society that is younger, more mixed ethnically and, on balance, more dynamic.
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Some eastern countries like Latvia now have fertility rates approaching 1.2.
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Similarly, points out Eric Kaufmann, in many countries, fundamentalist religious groups have fertility rates two or three times higher than the societies in which they live.
Already, several European nations have fertility rates even more modest than Japan's (though they still have a lower ratio of elderly, due to shorter life spans).
The obligation to retirees is skyrocketing due to lengthening lifespan, and the number of workers contributing into such funds is declining due to below-replacement fertility rates.
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The target reductions in fertility rates were reached long ago.
The odd ones out are America and Britain, which both have lots of women at work and fertility rates close to replacement level (with immigration making up the rest).
He added it appeared that the authors had not compared their sperm data and fertility rates with those of infertile men with varicoceles who did not have the embolisation procedure.
Another factor may be the impact of density, which, Cox demonstrates, tends to depress fertility rates not only here in the United States, but through much of the world.
Economic growth would be around 3 % per year, as populations became richer they would see a fall in fertility rates, just as countries which became rich in the past did.
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Dramatically improve those mortality tables and fertility rates drop.
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Ms d'Addio says the very low fertility rates now seen in many OECD countries are not inevitable, and governments should try to lessen the obstacles to childbearing faced by individuals and families.
But declining fertility rates imply that by 2050 there will be just 2.6 American workers supporting each pensioner and the figures for France, Germany and Italy will be 1.9, 1.6 and 1.5 respectively.
It exaggerated fertility rates and underplayed mortality rates.
So the two countries, South Korea and Japan, with the largest number of patent applications per capita have extremely low fertility rates, indeed two of the lowest fertility rates in the entire world.
Similar processes can be seen elsewhere in Latin America, where fertility rates have been dropping to levels closer to American and northern European norm, but not yet those of the ultra-low Japan or southern European countries.
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