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We identify the ages that constitute sensitive (or critical) periods in children's development towards their adult health status, skills, and human capital. For this, we use data on families migrating into Sweden from countries that are poorer, with less healthy conditions. Late-life health is proxied by adult height and other adult outcomes. The relation between siblings' ages at migration and their adult outcomes allows us to estimate the causal effect of conditions at specific childhood ages. We effectively exploit that, for siblings, the migration occurs simultaneously in calendar time but at different developmental stages (ages). We find evidence that the period just before the puberty growth spurt constitutes a critical period for adult height and we find related critical periods for adult cognition, mental health, and education. (

Despite the widely described consequences of childhood and adolescent overweight and obesity the economics literature to date has almost exclusively focused on the relationship between body size and earnings among adults. We provide new evidence on the long-run labor market penalty of teenage overweight and obesity using unique and large-scale data on 150,000 male siblings from the Swedish military enlistment. Our empirical analysis provides four important results. First, we show for the first time that there is a large adult male labor market penalty for being overweight and obese as a teenager. Second, we show that this result can be replicated using data from the USA and the UK. Third, we show a strikingly strong within-family relationship between body size, on the one hand, and cognitive skills and non-cognitive skills, on the other hand. Fourth, we show that a large part of the estimated body size penalty reflects lower skill acquisition among overweight and obese teenagers. All of these results hint at the importance of policy combating early life obesity in order to reduce healthcare expenditures as well as poverty and inequalities later in life.

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The protective effect of marriage on smoking has been extensively established in the literature. However, less is known about the dynamics of how smoking behaviour is connected to various marital life course events, and whether there are any gender discrepancies in this respect. In this article the connection between the marital life course and smoking is analysed from a stress-related perspective controlling for other socio-economic characteristics. We use information on 81,000 individuals from the Swedish longitudinal micro-level ULF (Survey of Living Conditions) database 1980-2000, which is randomly drawn from the sample population of all Swedes aged 16-84. Logistic regressions on current smoking status and changes in smoking behaviour of participants in the panel part of the data are estimated. The marital life course is strongly linked to smoking behaviour with being or getting married indicating low smoking risks and marital disruption indicating high risks. The divorced smoke to a higher extent than the widowed and there are signs that getting divorced implies higher risks than becoming widowed, both of taking up/relapsing and, for women, not being able to quit. Further, the results indicate that the connection between smoking cessation and living with a partner is stronger for men, whereas women are more affected by the propensity to start smoking after marital disruption. The protective effect of being married on smoking decreases with the age difference between spouses in households where the wife is older than the husband. Taken together, the results yield a rather complex pattern of smoking behaviour over the marital life course. Further, perceived financial stress is strongly connected to smoking and not being able to quit. Controlling for this effect still leaves a socio-economic status gradient in smoking.

By using historical data on about 50,000 twins born in Sweden during 1886-1958, we demonstrate a positive and statistically significant relationship between years of schooling and longevity. This relation remains almost unchanged when exploiting a twin fixed-effects design to control for the influence of genetics and shared family background. This result is robust to controlling for within-twin-pair differences in early-life health and cognitive ability, as proxied by birth weight and height, as well as to restricting the sample to MZ twins. The relationship is fairly constant over time but becomes weaker with age. Literally, our results suggest that compared with low levels of schooling (less than 10 years), high levels of schooling (at least 13 years of schooling) are associated with about three years longer life expectancy at age 60 for the considered birth cohorts. The real societal value of schooling may hence extend beyond pure labor market and economic growth returns. From a policy perspective, schooling may therefore be a vehicle for improving longevity and health, as well as equality along these dimensions.

This paper analyzes the impact of intermarriage on the economic integration of immigrants in Sweden, measured by annual earnings. We use longitudinal register data for the period 1990-2009 for the total population of immigrant men born 1960-1974. The results reveal large intermarriage premiums, but overall this seems to be a result of selection effects as most of the premium is visible already at the time of marriage. For the most economically marginalized immigrants, however, an intermarriage premium arises within marriage implying that forming a union with a native triggers a more rapid earnings growth among them.