A5009479999- Demographic Trends and Gender Preferences
- Evolutionary Psychology and Human Behavior
- Family Dynamics and Relationships
- Birth, Development, and Health
- Historical Economic and Social Studies
- Health disparities and outcomes
- Evolutionary Game Theory and Cooperation
- Epigenetics and DNA Methylation
- Marriage and Sexual Relationships
- Evolution and Genetic Dynamics
- Grief, Bereavement, and Mental Health
- Historical Studies on Reproduction, Gender, Health, and Societal Changes
- Intergenerational Family Dynamics and Caregiving
- Attachment and Relationship Dynamics
- Global Health Care Issues
- Rangeland Management and Livestock Ecology
- Taxation and Compliance Studies
- Assisted Reproductive Technology and Twin Pregnancy
- Physical Education and Training Studies
- Land Rights and Reforms
- Climate Change and Health Impacts
- Advancements in Semiconductor Devices and Circuit Design
- Genetic and phenotypic traits in livestock
- Agriculture and Farm Safety
- Sex and Gender in Healthcare
Carl von Ossietzky Universität Oldenburg
2018-2024
Statistics Sweden
2021-2024
Lund University
2019-2024
Max Planck Institute for Demographic Research
2012-2018
Google (United States)
2018
Justus-Liebig-Universität Gießen
2009-2010
To address claims of human exceptionalism, we determine where humans fit within the greater mammalian distribution reproductive inequality. We show that exhibit lower skew (i.e., inequality in number surviving offspring) among males and smaller sex differences than most other mammals, while nevertheless falling range. Additionally, female is higher polygynous populations nonhumans mammals on average. This patterning can be attributed part to prevalence monogamy compared predominance polygyny...
Monogamy appears to have become the predominant human mating system with emergence of highly unequal agricultural populations that replaced relatively egalitarian horticultural populations, challenging conventional idea-based on polygyny threshold model-that should be positively associated wealth inequality. To address this paradox, we generalize standard model a mutual mate choice predicting fraction women married polygynously. We then demonstrate two conditions are jointly sufficient make...
Higher paternal age at offspring conception increases de novo genetic mutations. Based on evolutionary theory we predicted older fathers' children, all else equal, would be less likely to survive and reproduce, i.e. have lower fitness. In sibling control studies, find support for negative effects survival reproductive success across four large populations with an aggregate N > 1.4 million. Three were pre-industrial (1670–1850) Western showed infant success. twentieth-century Sweden, found...
Abstract Parental death precipitates a cascade of events leading to more or less detrimental exposures, from the sudden and dramatic interruption parental care cohabitation with stepparents siblings in recomposed family. This article compares effect early loss on child survival past Krummhörn region East Frisia (Germany) among French Canadian settlers Saint Lawrence Valley (Québec, Canada). The was characterized by saturated habitat, while opportunities for establishing new family were...
The impact of the early loss one's father or mother on survival and age at death children was investigated basis a historical reconstitution families from Krummhörn (East Frisia/Ostfriesland; Germany) with aid Kaplan-Meier plots Cox regression. In our analyses, we took into account changed situation family after parent by incorporating surviving spouse's remarriage relationships stepparents. We find that sex-specific also depended whether what point in time during childhood their had died....
This article investigates the relationship between additional siblings and probability of offspring survival, marriage, fertility across historical populations St Lawrence Valley in Quebec (1670–1799) Krummhörn region Germany (1720–1874). Both existed agriculturally based economies, but differ important ways. The population faced a fixed supply land, which was concentrated amongst small number farmers. Most individuals were landless agricultural workers who formed relatively competitive...
Motivated by the cooperative breeding hypothesis, we investigate effect of having kin on mortality reproductive women based family reconstitutions for Krummhörn region (East Frisia, Germany, 1720–1874). We rely a combination Cox clustered hazard models and stratified at level. In order to study behavior-related effects, run series in which only who lived same parish are considered. To structural, non-behavior-related different model that include all living kin, regardless their spatial...

 In this paper, we investigate how the reproductive behavior of families in historical Krummhörn region was affected by their social status and short-term fluctuations socioeconomic conditions. Poisson Cox regression models are used to analyze age at first reproduction, fertility, sex ratio offspring, sex-specific infant/child survival, number children. addition, crop prices infant child mortality fertility using proportional models. We also include information about seasonal climate...
Among the population of Krummhörn region (Ostfriesland, Germany) in 18th and 19th centuries, death father family led on average to accelerated marriage his children. Three evolutionary explanations are offered for this "paternal absence" effect literature: namely, (i) assumption an adaptive "psychosocial acceleration" children with prepubertal experience uncertainty; (ii) opportunistic adjustment life reproduction decisions as reaction personal cost–benefit balances that changed by father's...
Abstract There is strong individual-level evidence that late fatherhood related to a wide range of health disorders and conditions in offspring. Over the last decades, mean paternal ages at childbirth have risen drastically. This has alarmed researchers from fields. However, existing studies an important shortcoming they lack long-term perspective. article step change providing such We unveil many countries current proportions fathers advanced age are not unprecedented. Taking detected...
Abstract Higher paternal age at offspring conception increases de novo genetic mutations (Kong et al., 2012). Based on evolutionary theory we predicted that the of older fathers would be less likely to survive and reproduce, i.e. have lower fitness. In a sibling control study, find clear support for negative effects survival, mating reproductive success across four large populations with an aggregate N > 1.3 million in main analyses. Compared born when father was 10 years younger,...
We measure the concentration of infant deaths in families historical populations Krummhörn, Germany and Québec, Canada order to investigate whether mothers recomposed differ regarding their maternal quality. In particular, we are interested stepmothers Krummhörn responsible for a diminution survival stepchildren because they poorly substitute child care or disadvantage stepchildren. The concentrations within two measured with Lorenz curves Gini coefficients, compared expected given by draws...
Objective We investigate the association between geographic proximity of grandparents on net marital fertility and maternal survival in Sweden, 1900–1910, within framework cooperative-breeding-hypothesis. Methods Data were derived from Swedish full-count censuses (1880–1910) Death Index. Married couples linked to their parental households. Poisson logistic regression analyses used geographical fertility, which we measured as number surviving children born 1900 1910, mother's survival. Models...
Functional trans-generational and parental effects are potentially important determinants of health in several mammals. For humans, the existing evidence is weak. We investigate whether disease exposure triggers functional response among humans by analyzing siblings who were conceived under different loads, comparing their mortality later epidemics. Under mechanisms, we expect that those high pathogenic stress load will have relatively low during a epidemic.We use data from Registre de la...
Objective It has been suggested that epigenetic inheritance is an important factor influencing mortality. We use data about the historical population of Québec (years 1670–1740) to study whether parents modify their offspring's phenotype epigenetically prior conception in response predicted/perceived If so, children growing up predicted environment enjoy a phenotype‐environment‐match should lower mortality, whereas nonpredicted have higher Methods large urban‐rural mortality differential...
The ratio of men and women in the adult population, i.e. sex ratio, has long been recognized as a key demographic constraint for partnering behavior. However, literature remains contradictory on how imbalances influence behavior, suggesting either higher or lower rates male marriage being associated with male-skewed ratios. These findings are likely due to data limitations. Cross-sectional limited observation periods preclude studies from distinguishing effects timing overall likelihood...
Life history theory predicts that exposure to high mortality in early childhood leads faster and riskier reproductive strategies. Individuals who grew up a regime will not overly wait until they find suitable partner form stable union because premature death would prevent them from reproducing. Cox proportional hazard models were used determine whether women experienced sibling during (0-5 years) reproduced earlier at an increased risk of giving birth illegitimate child, with illegitimacy...