The Effects of Fertility Rate on World Economy

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1. Dumbest video on Youtube. I hope your education is not tax funded. What a waste of money.
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3. In an ideal world, all the live long and die of old age, all have husband or wife and two
   children. In such a world is really an ideal family with two children. But we
   live in the real world where there is disease , death at a young age and
   difficulties in finding a marriage partner . Therefore, in the real world, the
   ideal is to be a family with three children. For a society to not died out to
   2.1 children per woman. Let's count how many children should be the couple to one
   woman in the society had 2.1 children . That is, in 10 women should give birth
   to 21 children.
   
   Suppose that 1 in 10 women childless , that is, 9 women should give birth to 21 children.
   
   Further assume that the two women have only one child ( later married , health problems, divorce, and so on ), now 7 women should give birth to 19 children. Suppose
   that 2 women have 2 children ( a widow , health problems , divorce and so on ),
   now 5 women should give birth to 15 children. That is, 5 out of 10 women to give birth to 3 children.
   
   When
   calculating the number of children in the family can not forget that about 10
   percent of pregnancies end in miscarriage , that is, 10 women have pregnancies
   23 . It turns out that 6 out of 10 women will be have three pregnancies in time of the life.
   
   Therefore, in today's world, the best is to be a family with 3 children. The ideal family with 3 children would be 5 out of 10 women (lucky women who married at the age of about 25 years old, have good health and a loving husband).