“Explaining fertility transitions.” Demography, 34(4), 443-454.
- 1996 PAA Address
- In this paper, Mason sketches the six most commonly cited theories of fertility transition and their major criticisms, describes 4 fundamental problems in the way demographers have previously thought about fertility transitions, and sketches a more interactive approach to understanding fertility decline
Major theories
1. Notestein’s (1953) Demographic Transition Theory
- Attributes fertility decline to changes in social life that accompany, and are presumed to be caused by, industrialization and urbanization
- These changes are preceded by mortality decline, which sets the stage for subsequent fertility decline by increasing the size of families
- Furthermore, urbanization and industrialization make it expensive to have lots of children
- One major problem with this theory is that correlations between levels of urbanization/industrialization at the national level have been found to be weak (Princeton Fertility Project)
2. Lesthaeghe’s (1983, 1995) theory of shift in values of individualism
- A shift in values towards individualism and self-fulfillment accompanies the rising secularization and affluence of developed countries
- People find value in other activities than having and raising kids
- One criticism of this theory is that fertility has dropped in many East Asian countries (such as Bangladesh) without any apparent shift toward these values
3. Caldwell’s (1982) theory of intergenerational wealth flows
- Economic and cultural forces contributes to the rise of the nuclear family
- The rise of the nuclear family makes children, rather than parents, the recipients of intergenerational wealth flows, and reduces the economic incentives to have lots of kids
- One problem with theory is that it doesn’t account for fertility decline in East Asia, where little change in the value of the extended family has occurred
4. Becker’s (1960) neoclassical economic theory
- Three proximate determinates govern couples’ fertility choices:
1. the relative cost of children versus other goods,
2. the couple’s income, and
3. their preferences for children versus other forms of consumption
A major criticism of this theory is that it does not explain the environmental and institutional conditions that serve to change costs, income, or preferences over the course of the fertility transition
5. Easterlin’s (1975, 1978) microeconomic theory
- Elaborates on Becker’s theory and explains fertility in terms of three proximate determinants:
1. the supply of children in the absence of fertility limitation,
2. the demand for children, and
3. the costs of fertility regulation
- Like Becker, Easterlin’s theory does not elaborate on the institutional and environmental drivers for changing demand for children and costs of fertility regulation
6. Cleland and Wilson’s (1987) theory of ideational change
- Fertility transitions arise due to the diffusion of new information and new social norms about birth control
- This theory does little to explain fertility patterns in regions like Africa where number of surviving children, rather than number of births, is the main factor driving fertility
4 problems with our previous thinking about fertility transitions
1. Assuming that all transitions must have the same cause
- This is unreasonable given the existence of potentially important influences on fertility in only some times or places (for instance, state-organization family planning programs didn’t exist in the 1800s), the increasing evidence that diffusion of ideas can influence fertility behavior even in the absence of major structural changes, and in light of large demographic and social variation across pretransitional populations
2. Ignoring mortality decline as a precondition for fertility decline
- Researchers have pointed to evidence that fertility decline has occurred at various levels of mortality to disprove this theory
- However, Mason points to two factors that may reduce the correlation between mortality decline and fertility decline
- First, even if mortality does decline, families may deal with the prospective survival of many children (and the potential decline in standard of living) in ways other than limiting fertility, such as by sending the children to work as servants, by having them migrate overseas, or even by choosing to delay marriage (Davis’ 1963 multiphasic response theory)
- Second, parents’ perceptions of child mortality may differ from the reality
3. Assuming that parity-related measures of birth control did not exist in pre-transition populations
4. Focusing on too narrow of a time scale
- For instance, one of the major findings of the Princeton Fertility Project was that fertility decline was only weakly correlated with economic modernization in Europe (Coale, 1973)
- Coale argued that this finding undermined demographic transition theory
- Mason doesn’t believe that this conclusion is justified because we cannot expect the effects of modernization on fertility to happen immediately
Mason’s interactive theory
- Before articulating her theory, Mason outlines some agreed-upon facts about the fertility decline
1. Fertility transitions occur under a variety of institutional, cultural, and environmental conditions
2. Within a given geographical/cultural region, the first population to undergo a fertility decline is likely to have undergone some structural changes, but this is not necessarily true of subsequent populations
3. The sped which influence diffusion of fertility decline depends upon a number of factors, including language, social networks, etc.
4. When the number of children exceeds family’s capacity to support them, the family will engage in some sort of offspring control, but this can involve both post-natal and pre-natal controls
- Mason suggests that any theory of fertility decline must be both ideational in that they recognize that changing perceptions ultimately drive fertility change, and interactive in that they must recognize that various changes in the population work together to influence fertility decline
- One important interaction occurs between the types of postnatal controls that populations use and external changes that alter the costs of these controls relative to prenatal controls
- For instance, laws regulating child labor and education may have increased the costs of these postnatal strategies to maintaining large family size, and made birth control a more attractive option |