This article investigates the reproductive behavior of young women and men in the post-Soviet Central Asian republic of Kyrgyzstan, focusing on the link between migration and fertility. We employ event-history techniques to retrospective data from the ‘Marriage, Fertility, and Migration’ survey conducted in Northern Kyrgyzstan in 2005 to study patterns in first-time parenthood. We demonstrate t...

the first demographic transition started in many western industrialized societies around the latter part of the nineteenth century with steady mortality improvement. expectation of life at birth, about 40 years at the start of the transition, has now doubled (riley 2001). Fertility declined from a level of about five children to under two children per woman over the same period (Coale and watki...

Conventional R&D-based growth theory suggests that productivity growth is positively correlated with population size or population growth, an implication which is hard to see in the data. Here we integrate R&D-based growth into a unified growth setup with micro-founded fertility and schooling behavior. We then show how a Beckerian child quality-quantity trade-off explains why higher growth of p...

In this paper, we examine the relationship between individual attributes, aggregate female labor force participation, and family policies, (e.g., child care and family leave) on fertility in developed countries using a hierarchical Bayesian model. Data from the European Values Survey, the World Values Survey, and the Organization for Economic Cooperation and Development are employed in this ana...

Substantial international aid is spent reducing the cost of contraception in developing countries, as part of a larger effort to reduce global fertility and increase investment per child worldwide. The importance for fertility behaviors of keeping contraceptive prices low, however, remains unclear. Targeting of subsidies and insufficient price variation have hindered prior attempts to estimate ...

Seminal fluid factors have been shown to play a significant role in fertility in many animals. However, little is known about the contributions of seminal fluid to male fertility in C. elegans. In this commentary, we summarize our recent finding of a seminal fluid sperm activator, the serine protease TRY-5. TRY-5 is required for males to activate sperm, yet surprisingly it is not required for m...

Although it has been known for many years that estrogen administration has deleterious effects on male fertility, data from transgenic mice deficient in estrogen receptors or aromatase point to an essential physiological role for estrogen in male fertility. This review summarizes the current knowledge on the localization of estrogen receptors and aromatase in the testis in an effort to understa...

BACKGROUND Though there has been profound research on the curious change in correlation between total fertility rate (TFR) and female labor force participation (FLP) in the mid-1980s, aspects of the compositional character of age-specific effects and the nature of countries’ heterogeneity have been neglected. OBJECTIVE The present paper aims to contribute to filling this gap by analyzing annual...

In Kohler and Ortega (2002a) [online available at Demographic Research, Volume 6, Article 6], we introduce a new set of tempo-adjusted period parity progression measures in order to account for two distinct implications caused by delays in childbearing: tempo distortions imply an underestimation of the quantum of fertility in observed period data, and the fertility aging effect reduces higher p...

Delayed First Birth and New Mothers’ Labor Market Outcomes: Evidence from Biological Fertility Shocks We investigate the impact of delaying the first birth on Italian mothers’ labor market outcomes around childbirth. The effect of postponing motherhood is identified using biological fertility shocks, namely the occurrence of miscarriages and stillbirths. Focusing on mothers’ behavior around fir...