Studies showed that during periods of high fertility, women are more drawn to more rugged, dominant-looking men.
Much of this population growth is expected to come from high fertility countries, 39 of which are in Africa.
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Humanity was once caught in the trap of high fertility and high mortality.
Domestic Latino migration to these states and the high fertility of Latino families are adding to the numbers there.
In the 1970s the main explanation for the continent's high fertility was cultural.
The main concern of demographers in their heyday (the 1970s and 1980s) was high fertility and the total number of the world's people.
Many women may choose Mr. Stable instead of Mr. Sexy as their mates, but new research shows that during periods of high fertility, Mr. Stable is on the hot seat.
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Women who rated their mates as more sexually attractive, meanwhile, did not exhibit these changes and instead reported being more satisfied with their relationship at high fertility than at low fertility.
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This is because such countries have moved furthest along the demographic transition from poor, high-fertility status to richer, low-fertility status.
The researchers found that women mated to the less sexually attractive men were significantly more likely to find fault with their partners and, again, feel less close to their partners during the high-fertility period than the low-fertility period.
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If the high-fertility nations were to see dramatic declines in Total Fertility Rates (TFRs, the number of children per woman during her reproductive life-time) we would need to see drastic cuts in reproductive rates in at least 40% of all nations and that would have to start today.
There are countries with extremely low fertility and extremely high levels of innovation (Hong Kong, Singapore), countries with a moderate level of fertility and moderate to high amounts of innovation (United States, Israel), and countries with both low fertility and low levels of innovation (Italy, Greece).
For developed nations with high income and low fertility, most population increase comes from immigration.
Admittedly, Africa is lagging behind Asia by about 20 years, and the continent's fertility rates are still high, but the trend is clear.
Young age structure combines high migration with lower life expectancy and higher fertility.
For all developed countries, high life expectancy is also associated with below-replacement fertility, which reduces the ratio of workers to retirees.
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Lots of things are important when it comes to stock performance, and unfortunately a rather disturbingly high number of them are generally ignored by most investment analysts: religion (yes, religion), fertility, ethical corruption, moral corruption, property rights, soundness of currency, debt, tax progressivity, and size of government (which is another topic on which Mr. Mauldin has become a little muddled: more on this later).
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