You may find that the relationship between birth rate and standard of living is the opposite of what you described.<p>We actually have some pretty good existing examples to draw from to conclude this. Japan has arguably the highest standard of living, but also a decreaseing birth rate.<p>Women in Australia and America are having children later in life, and having fewer of them as well.<p>Meanwhile in developing countries where access to birth control and education are more limited, birth rates are sky high.