Miriam Evensen (Norwegian Institute of Public Health) and Torkild Lyngstad (University of Oslo) used population-based data from Norway and found that adolescent males with externalising disorders - such as anxiety and depression - have a lower chance of becoming a parent by age 30 than other men.

Because of the time lag between the act of smoking and dying from smoking, and because males generally take up smoking before females do, male and female smoking epidemiology often follows a typical double wave pattern dubbed the ‘smoking epidemic’. Research from Maarten Wensink (CPop) et al. aimed to answer the questions: How are male and female deaths from this epidemic differentially progressing in high-income regions on a cohort-by-age basis? How have they affected male-female survival differences?

Does the balance of "nature" and "nurture" depend on whether you grew up in a society with high or low social mobility?In a recent study in PNAS, Per Engzell and Felix Tropf explore the roles of family of origin and genetics on educational attainment. 

A recent study by Eva Beaujouan and Caroline Berghammer looked at the fertility gap among women in 19 European countries and the United States. Their results indicate that on average, compared to earlier expectations and intentions, women had fewer children and were childless more often. Fertility gaps differed by country & education level, leading to possible structural explanations.

Using administrative registers that covered the entire Norwegian population, Trude Lappegård and Tom Kornstad found that the higher the share of fathers using parental leave in the municipality (social norm), the more likely women were to have their first and second child. Looking at the decision to have a second child, the effect of father’s engagement is actually stronger compared to the decision of becoming parents for the first time.

To address the lack of research on how long young adults want to live, Bowen et al. conducted a survey of over 700 university students in Austria, Norway, Poland and Russia. They asked students how long they want to live (preferred life expectancy), how long they expect to live (subjective life expectancy) and how long they think an average person of the same age and sex will live (belief about average cohort life expectancy).

Perelli-Harris et al. investigated whether individuals who cohabit have similar levels of subjective wellbeing (SWB) as married people. They studied events and characteristics correlated with entrance into marriage; whether marriage may be more advantageous for those with a lower or higher tendency to marry; and, finally, whether there is variation by country and gender between partnership type and SWB.