Higher socioeconomic status (SES) is associated with lower mortality, and this correlation has been confirmed using different indicators across several geographical settings. Nevertheless, the timing of the emergence of the SES gradient remains unclear. We used individual-level longitudinal data for a regional population in southern Sweden covering the period between 1813 and 2014, and we applied a cause-specific proportional hazard model. We estimated SES differences in all-cause, nonpreventable, preventable, and cause-specific adult mortality in four subperiods (1813–1921, 1922–1967, 1968–1989, 1990–2014) by gender adjusting for birth year, place of residence, marital status, and migration status. The SES gradient in mortality present today for both genders emerged only around 1970, and with few exceptions, it emerged at approximately the same time for all causes of death. It emerged earlier for women than for men, particularly in infectious diseases. In the nineteenth and early twentieth centuries, we found a positive association between SES and mortality from circulatory diseases for men. SES has not always been a fundamental cause of mortality; it only emerged as such in the second half of the twentieth century. We argue that habits and behaviors embedded in the different social strata played a major role in the emergence of the SES gradient.

BACKGROUNDThis article examines the impact of parental death in childhood, adolescence, and adulthood on male and female age at marriage in the Netherlands in the period 1850-1940. It follows an interdisciplinary approach as it considers explanations based on social and demographic history and evolutionary biology. OBJECTIVEWe study the classical historical framework in more detail by controlling for the age at parental death. Moreover, we study if evolutionary or social-demographic explanations are better able to predict the impact of parental death on marriage behavior in a historical population. METHODSWe apply event-history analysis to the Historical Sample of the Netherlands, which includes life courses of more than 24,000 individuals in marital age. RESULTSLosing a parent in early childhood delays transition to marriage for sons and has no significant effect on daughters. Parental death in adulthood, however, accelerates entry into marriage for children of farmers. CONCLUSIONSEarly parental death hindered a smooth transition to marriage but the inheritance of land in adulthood created marriage opportunities both for men and women. The results suggest that farming families employed fast marriage of adult children to restore the gender balance on the farm. http://www.demographic-research.org CONTRIBUTION Marriage in the period 1850-1940 was strongly determined by regional, cultural, religious, and financial constraints. The proposed evolutionary explanations, and the one based on life history theory in particular, are therefore not able to predict the relationship between parental death and marriage behavior. Accordingly, we advise not to use the age at marriage as a proxy for reproductive and risky sexual behavior.

IntroductionSweden has long been praised for a generous parental leave policy oriented towards facilitating a gender-equitable approach to work and parenting. Yet certain aspects of Swedish parental leave could also be responsible for the maintenance of (or even the increase in) health inequalities. Using a ‘Health in All Policies’ lens, this research project aims to assess the unintended health consequences of various components of Sweden’s parental leave policy, including eligibility for and uptake of earnings based benefits.Methods and analysisWe will use individual-level data from multiple Swedish registers. Sociodemographic information, including parental leave use, will be retrieved from the total population register, Longitudinal Integration Database for Health Insurance and Labour Market Studies and Social Insurance Agency registers. Health information for parents and children will be retrieved from the patient, prescribed drug, cause of death, medical birth and children’s health registers. We will evaluate parents’ mental, mothers’ reproductive and children’s general health outcomes in relation to several policy reforms aiming to protect parental leave benefits in short birth spacing (the speed premium) and to promote father’s uptake (the father’s quota) and sharing of parental leave days (the double days reform). We will also examine effects of increases in basic parental leave benefit levels. Using quasi-experimental designs, we will compare health outcomes across these reforms and eligibility thresholds with interrupted time series, difference-in-difference and regression discontinuity approaches to reduce the risk of health selection and assess causality in the link between parental leave use and health.Ethics and disseminationThis project has been granted all necessary ethical permissions from the Stockholm Regional Ethical Review Board (Dnr 2019-04913) for accessing and analysing deidentified data. The final outputs will primarily be disseminated as scientific articles published in open-access, high-impact peer-reviewed international journals, as well as press releases and policy briefs.