Tropical Africa is known to be lagging far behind the rest of the world in its fertility transition. Many attempts have been made to specify the factors responsible for its resistance to fertility decline; however, no systemic explanation of the mechanisms sustaining its high fertility has been presented in cross-cultural perspective. In this article, we show how a set of anthropological factors provides both social and economic foundations for the preservation of high fertility in tropical Africa. Cross-cultural tests imply that the most important obstacles to tropical Africa's fertility transition are (a) a high ideal family size, (b) a large potential to absorb increases in the female labor force participation rate without any substantial decreases in fertility due to ample child care readily available through extended family structures, (c) a large potential to increase fertility at the early stages of economic development through the abolition of postpartum sex taboos,

It has long been noticed that older people tend to be more religious than younger people. However, it is still disputable whether this fact should be attributed to people generally becoming more religious with age per se (age effect), or to the process of secularization, wherein earlier cohorts (to which the now older people belong) used to be more religious than those that appeared later, younger cohorts (cohort effect). We try to distinguish between these two effects using a multifactor model applied to World Values Survey data (1981–2014) and find that at least in the developed countries the age effect strongly prevails over the cohort effect. This finding has important implications, e.g., that population aging in OECD countries can possibly slow down the transition from religious to secular values. This effect is already visible in some countries, such as Japan.

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