Are falling birth rates in rich countries driven by younger women?
Core argument: American women's average number of children fell from 3.6 in 1960 to 1.6 in 2023, with the decline concentrated among younger women, while women aged 30 and above are having more children.
Birth rates have collapsed because young women are not having as many children. In 1960 American women had on average 3.6 children. In 2023 they had 1.6. Remarkably, women aged 30 and above are having more children. It is only younger women who are having fewer. The decline among younger women is itself concentrated among teenagers. More than half the drop in America’s total fertility rate is explained by women under the age of 19 now having next to no children. Meanwhile, there is little evidence that middle-class women wish they had many more children, which would at least suggest they might be open to official persuasion. Today, at the age of 24, college-educated American women want on average 2.2 children roughly as many as previous generations. They will now have these children a little later than before, with the first arriving at the age of 30, compared with 28 in 2000. Although trends suggest that they will fall short of their ideal family size, the gap may be the same as for women in previous generations, who missed the target by an average of 0.25 children.

