Article
Public, Environmental & Occupational Health
James Orwa, Samwel Maina Gatimu, Paulino Ariho, Marleen Temmerman, Stanley Luchters
Summary: In Kenya, there are disparities in fertility rates among married women of reproductive age. The study found that education level is the main factor affecting the decline in fertility rates between 2003 and 2014.
Article
Economics
Jie Ma, Xiaojun Yang
Summary: This study examines the role of intra-generational upward mobility in determining the fertility of transition countries. The findings suggest that upward mobility increases fertility through a positive income effect, highlighting the importance of considering upward mobility in boosting fertility and its significant implications for demographic policy.
Article
Economics
Michael Grimm
Summary: High variance in rainfall is associated with significantly higher fertility differentials, indicating a role of rainfall risk in the demographic transition. This effect diminishes as irrigation systems and agricultural machinery become prevalent.
JOURNAL OF ECONOMIC GEOGRAPHY
(2021)
Article
Mathematics
Joan C. Mico, David Soler, Maria T. Sanz, Antonio Caselles, Salvador Amigo
Summary: This study successfully predicts the future changes in the population pyramid of Spain by modifying a mathematical model. The results show that by increasing the birth rate and immigration rate, and decreasing the emigration rate, the dependency ratio can be reduced and there will be an increase in the female population aged 20 to 39.
Article
Demography
Dylan Shane Connor
Summary: This study reveals that parents' choice of names for their children can reflect their fertility behavior, with traditional and Catholic names associated with higher fertility rates among Irish couples circa 1911. However, urbanization in towns and cities was found to lower net fertility rates and weaken preferences for traditional and religious names. This suggests that traditional rural norms played a significant role in driving high fertility rates in Ireland, rather than explicit religious influences.
Article
Economics
Fabian Siuda, Uwe Sunde
Summary: This paper empirically investigates the impact of population shocks, such as repeated outbreaks of the plague, on the timing of demographic transitions. Using disaggregate data from Germany, the study finds that areas with greater exposure to plague outbreaks experienced an earlier onset of demographic transitions. The results are in line with predictions from unified growth literature and offer new insights into the empirical determinants of the transition from stagnation to growth.
JOURNAL OF ECONOMIC GROWTH
(2021)
Article
Multidisciplinary Sciences
Nega Mihret Alazbih, Assefa Hailemariam Kaya, Mezgebu Yitayal Mengistu, Kassahun Alemu Gelaye
Summary: The aim of this study was to assess the timing of marriage and durations of birth intervals and their associated factors, and to examine their effects on the current fertility among women in Dabat health and demographic surveillance system site, Northwest Ethiopia. The study found that early age at first marriage was associated with longer birth intervals. Factors such as education, occupation, child death, and ideal number of children affected the timing of age at first marriage and duration of birth intervals.
Article
Public, Environmental & Occupational Health
Lei Wang, Ting Wang, Hui Li, Kaiwen Guo, Lynn Hu, Siqi Zhang, Scott Rozelle
Summary: This study explores the relationship between parental self-perception and early childhood development in rural Western China. It found that parental self-perception is positively associated with child social-emotional development across different ages, and there is a mediating role of parental investment in the association between parental self-perception and child cognitive development. The study emphasizes the importance of policymakers strengthening parental self-perception and investment for better child development outcomes in rural areas.
FRONTIERS IN PUBLIC HEALTH
(2022)
Article
Demography
Emily A. Marshall, Hana Shepherd
Summary: This study uses data from the Relationship Dynamics and Social Life study to explore the relationship between attitudinal heterogeneity in a small geographic area and the predictions of the Second Demographic Transition (SDT) theory. The study finds that different attitude groups are related to subsequent fertility at early ages.
POPULATION RESEARCH AND POLICY REVIEW
(2022)
Article
Biology
Isimeme N. Udu, Michael B. Bonsall, Hope Klug
Summary: Parental care has been gained and lost evolutionarily multiple times. The loss of parental care is influenced by low egg and adult death rates, quick egg maturation, and high level of care provided. Evolutionary hysteresis makes it challenging to lose parental care, particularly when eggs develop slowly.
PROCEEDINGS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES
(2022)
Article
Economics
Koji Kitaura, Kazutoshi Miyazawa
Summary: The study finds that conditional cash transfers can help alleviate poverty traps in the short term, but may worsen overall income inequality by increasing the fertility rate of low-income groups.
ECONOMIC MODELLING
(2021)
Article
Economics
Yu Bai, Dorien Emmers, Ying Li, Lei Tang
Summary: This study investigates the relationship between caregivers' internal or external parental locus of control (PLOC) orientation and child development outcomes. The results show that caregivers with an internal PLOC orientation are more likely to invest in a stimulating home environment and improve child development outcomes. Grandparent caregivers, on the other hand, tend to have an external PLOC orientation, which is associated with reduced engagement in interactive caregiver-child activities.
CHINA ECONOMIC REVIEW
(2022)
Article
Demography
Jonathan J. Adams
Summary: Advanced economies undergo three transitions during their development: transition from a rural to an urban economy, transition from low-income growth to high-income growth, and transition from high fertility and mortality rates to low modern levels. The timing of these transitions is correlated in the historical development of most advanced economies. Additionally, the research shows that a declining urban-rural wage gap, a declining rural-urban family size ratio, and the surprising finding that early urbanization slows development.
JOURNAL OF DEMOGRAPHIC ECONOMICS
(2022)
Article
Multidisciplinary Sciences
Balazs Vagi, Daniel Marsh, Gergely Katona, Zsolt Vegvari, Robert P. Freckleton, Andras Liker, Tamas Szekely
Summary: This study reveals the association between fertilisation mode and parental care in an early vertebrate group, suggesting that internal fertilisers enable terrestrial reproduction and contribute to the diversity of terrestrial vertebrates.
SCIENTIFIC REPORTS
(2022)
Article
Family Studies
Yanan Zhang
Summary: This study found that the three dimensions of socioeconomic status (SES) significantly predicted family investments and adolescent outcomes, with different investment pathways mediating different effects on adolescent outcomes. These findings expand our understanding of the relationship between SES and the family investment model (FIM).
CHILDREN AND YOUTH SERVICES REVIEW
(2021)
Article
Anthropology
Aaron D. Blackwell, Samuel S. Urlacher, Bret Beheim, Christopher von Rueden, Adrian Jaeggi, Jonathan Stieglitz, Benjamin C. Trumble, Michael Gurven, Hillard Kaplan
AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY
(2017)
Article
Psychology, Biological
Jonathan Stieglitz, Michael Gurven, Hillard Kaplan, Astrid Hopfensitz
EVOLUTION AND HUMAN BEHAVIOR
(2017)
Article
Biochemistry & Molecular Biology
Benjamin C. Trumble, Jonathan Stieglitz, Aaron D. Blackwell, Hooman Allayee, Bret Beheim, Caleb E. Finch, Michael Gurven, Hillard Kaplan
Letter
Medicine, General & Internal
Hillard Kaplan, Benjamin C. Trumble, Jonathan Stieglitz, Jagat Narula, Michael Gurven, Gregory S. Thomas
Article
Medicine, General & Internal
Hillard Kaplan, Randall C. Thompson, Benjamin C. Trumble, L. Samuel Wann, Adel H. Allam, Bret Beheim, Bruno Frohlich, M. Linda Sutherland, James D. Sutherland, Jonathan Stieglitz, Daniel Eid Rodriguez, David E. Michalik, Chris J. Rowan, P. Lombardi, Ram Bedi, Angela R. Garcia, James K. Min, Jagat Narula, Caleb E. Finch, Michael Gurven, Gregory S. Thomas
Article
Psychology, Biological
Eric Schniter, Nathaniel T. Wilcox, Bret A. Beheim, Hillard S. Kaplan, Michael Gurven
EVOLUTION AND HUMAN BEHAVIOR
(2018)
Article
Psychology, Biological
Chris von Rueden, Sarah Alami, Hillard Kaplan, Michael Gurven
EVOLUTION AND HUMAN BEHAVIOR
(2018)
Article
Public, Environmental & Occupational Health
Sarah Alami, Jonathan Stieglitz, Hillard Kaplan, Michael Gurven
SOCIAL SCIENCE & MEDICINE
(2018)
Article
Psychology, Biological
Paul L. Hooper, Hillard S. Kaplan, Adrian V. Jaeggi
Summary: By modeling the hawk-dove and prisoner's dilemma games, researchers found that a leveller strategy can be evolutionarily stable under conditions of high gains from cooperation, leading to a new egalitarian equilibrium. Cooperation is more likely to foster greater equality when individuals can withhold its benefits from potential dominators.
NATURE HUMAN BEHAVIOUR
(2021)
Article
Multidisciplinary Sciences
Hillard Kaplan, Paul L. Hooper, Margaret Gatz, Wendy J. Mack, E. Meng Law, Helena C. Chui, M. Linda Sutherland, James D. Sutherland, Christopher J. Rowan, L. Samuel Wann, Adel H. Allam, Randall C. Thompson, David E. Michalik, Guido Lombardi, Michael I. Miyamoto, Daniel Eid Rodriguez, Juan Copajira Adrian, Raul Quispe Gutierrez, Bret A. Beheim, Daniel K. Cummings, Edmond Seabright, Sarah Alami, Angela R. Garcia, Kenneth Buetow, Gregory S. Thomas, Caleb E. Finch, Jonathan Stieglitz, Benjamin C. Trumble, Michael D. Gurven, Andrel Irimia
Summary: This study examines brain volume in two indigenous South American populations and finds that the decline in brain volume with age is slower compared to high-income nations. The results are consistent with the evolutionary model of brain health and have implications for interventions to improve brain health.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2023)
Article
Biology
Ann E. Caldwell, Daniel K. Cummings, Paul L. Hooper, Benjamin C. Trumble, Michael Gurven, Jonathan Stieglitz, Helen E. Davis, Hillard Kaplan
Summary: Over 80% of adolescents worldwide are insufficiently active, posing massive public health and economic challenges. Like post-industrialized populations, declining physical activity and sex differences in activity accompany transitions from childhood to adulthood. Tanner stage mediates the age-activity association, reflecting higher energetic demands for growth and reproductive maturation.
PROCEEDINGS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES
(2023)
Article
Psychology, Biological
Jonathan Stieglitz, Benjamin C. Trumble, Hillard Kaplan, Michael Gurven
NATURE HUMAN BEHAVIOUR
(2018)
Article
Psychology, Biological
Hillard S. Kaplan, Eric Schniter, Vernon L. Smith, Bart J. Wilson
NATURE HUMAN BEHAVIOUR
(2018)
Article
Anthropology
Jonathan Stieglitz, Benjamin C. Trumble, Hillard Kaplan, Michael Gurven
AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY
(2017)
Article
Psychology, Developmental
Michael Gurven, Eric Fuerstenberg, Benjamin Trumble, Jonathan Stieglitz, Bret Beheim, Helen Davis, Hillard Kaplan
DEVELOPMENTAL PSYCHOLOGY
(2017)