The effect of social status on women's age at first childbirth in the late seventeenth- to early eighteenth-century Korea

While records on historical population are available and do exist, the fact that they are so limited in nature is a critical problem. We applied the method of family reconstitution to a Korean household register to deal with these limitations. Based on family reconstitution from five successive registers, we calculated women's age at first childbirth for each social status in two ways: “observed woman's age” at first childbirth = woman's current age–age of her first child, and “estimated woman's age” at first childbirth, which uses linear regression analysis on the basis of positive association between women's age and the age of their firstborn. Our results shed light on the effects of social status and cultural factors on the age at which women in pre-industrial Korea bore their first child.