[MUSIC] Welcome to Understanding China, 1700- 2000, A Data Analytic Approach, Part Two, Section 10, Reproduction, and Adoption. This culture of conscious choice over reproduction meant, in fact, that in China, there would be the development of a widespread practice of adoption, which did not exist in the west. Now, in China, and other family centered societies, the primary motivation for adoption lies with the adopter to have a source of labor, a source of old age support, and heir to carry on the family line. In contrast, in individual-oriented European societies, the primary concerns were on the adopted, the individual orphans, both to show as an exercise of Christian love and to secure the transmission of property and assets of the deceased parents and other kin. Now why did Chinese married couples adopt? Because historically, first of all, because of the practice of female infanticide which we discussed earlier. As many as 10 to 15 percent of Chinese adult males, in fact, never married. Another 20 percent of those who did marry simply had only daughters. And due to the low fecundity of Chinese couples, even those parents who had sons were not guaranteed by the time they had reached old age that those sons would have survived. So as a result, one quarter to one third or more of all adult men in China historically had to rely on male adoption in order to have surviving male issue. Now male adoption is poorly recorded in most Chinese historical Big Data. The one exception is the Chinese Multi-Generational Panel Dataset- Imperial Lineage, the CMGPD-IL, which covers a period of two and a half centuries. For the 17th through the early 20th century with a total of, in this case, 78,715 individuals. According to these records, which we also had to use when we wanted to look at female infanticide, the adoption of sons was also highly prevalent. >> Of the 18,620 sons who survived to age five, 1,200 or almost 7 percent are recorded as being given up for adoption within the lineage. Generally, those families who adopted in had no biological sons. Those families who adopted out had more than one son. And the adopting parents, in, out generally were closely related. Moreover, because of the social needs of the adopting parents, both the adopting parents and the children tended to be considerably older than adopting parents and children in the West. This table shows the mean age of adoption for both fathers and sons in the Qing Imperial lineage 1700 to 1850. And as you can see, unlike adoption today, the age of adoption varied widely, much more widely than contemporary populations. While it's true that one-third of all adopted sons were adopted in the first year of life, half were adopted at age five or above. Including 20% of all adopted sons who in fact were adopted over the age of 20, and as many as 5% of adopted sons who were as old as age 30 or more when they were adopted. Indeed, in fact the oldest adopted son in this data set of 1200 adopted sons, was aged 61 when he was adopted. What this means is that on the one hand we see the exercise of conscious choice over reproduction. On the other hand, we can see that even the meaning of children and parents in adoption was quite different from what contemporary understanding of adoption and parental responsibilities. Adoption therefore was an important insurance mechanism to ensure the proper functioning of the Chinese demographic system. And we can see in this chart the interrelationship between adoption, birth and infanticide in the 18th and the early 19th century in the Ching Imperial lineage. And you can see that as adoption, the empty circles, increased in the late 18th and early 19th century, that this is also reflected by a decrease in the number of births. And an increase in the number of female infanticides. In other words, as birth was declining and infanticide was increasing, couples increasingly were resorting to adoption to guarantee that they would have surviving male issue. So we can see how the discussion of infanticide in section two, and the discussion of birth in section three, and this discussion of adoption are interrelated together to form a system of demographic calculations of conscious choice. [MUSIC]