The Health Returns to Education: What Can We Learn from Twins?

This paper estimates the health returns to education, using data on identical twins. I adopt a twin-differences strategy in order to obtain estimates that are not biased by unobserved family background and genetic traits that may affect both education and health. I further investigate to what extent within-twin-pair differences in schooling correlates with within-twin-pair differences in early life health and parent-child relations. The results suggest a causal effect of education on health. Higher educational levels are found to be positively related to self-reported health but negatively related to the number of chronic conditions. Lifestyle factors, such as smoking and overweight, are found to contribute little to the education/health gradient. I am also able to rule out occupational hazards and health insurance coverage as explanations for the gradient. In addition, I find no evidence of heterogenous effects of education by parental education. Finally, the results suggest that factors that may vary within twin pairs, such as birth weight, early life health, parental treatment and relation with parents, do not predict within-twin pair differences in schooling, lending additional credibility to my estimates and to the general validity of using a twin-differences design to study the returns to education.health production, education, schooling, twins, siblings, returns to education, ability bias

Nature, Nurture and Egalitarian Policy: What Can We Learn from Molecular Genetics?

This brief paper draws attention to molecular genetic research which may provide a new dimension to our understanding of how socioeconomic outcomes are generated. In particular, we provide an overview of the recently emerging evidence of gene-environment interaction effects. This literature points out specific policy areas which may compensate individuals carrying genetic risks, without resorting to gene mapping of the population. Such policies would also increase intergenerational mobility if genetic and/or environmental risk factors are more common in socially disadvantaged groups.gene, environment, interaction, molecular genetics, inequality

The Health Returns to Education - What can we learn from Twins?

This paper estimates the health returns to education, using data on identical twins. I adopt a twin-differences strategy in order to obtain estimates that are not biased by unobserved family background and genetic traits that may affect both education and health. I further investigate to what extent within-twin-pair differences in schooling correlates with within-twin-pair differences in early life health and parent-child relations. The results suggest a causal effect of education on health. Higher educational levels are found to be positively related to self-reported health but negatively related to the number of chronic conditions. Lifestyle factors, such as smoking and overweight, are found to contribute little to the education/health gradient. I am also able to rule out occupational hazards and health insurance coverage as explanations for the gradient. In addition, I find no evidence of heterogenous effects of education by parental education. Finally, the results suggest that factors that may vary within twin pairs, such as birth weight, early life health, parental treatment and relation with parents, do not predict within-twin pair differences in schooling, lending additional credibility to my estimates and to the general vailidy of using a twin-differences design to study the returns to education

Socioeconomic Heterogeneity in the Effect of Health Shocks on Earnings. Evidence from Population-Wide Data on Swedish Workers

In this paper, we estimate socioeconomic heterogeneity in the effect of unexpected health shocks on labor market outcomes, using register-based data on the entire population of Swedish workers. We effectively exploit a Difference-in-Difference-in-Differences design, in which we compare the change in labor earnings across treated and control groups with high and low education levels. If the anticipation effects are similar for individuals with high and low education, any difference in the estimates across socioeconomic groups could plausibly be given a causal interpretation. Our results suggest a large amount of heterogeneity in the effects, in which individuals with a low education level suer relatively more from a given health shock. These results hold across a wide range of different types of health shocks and become more pronounced with age. Our results suggest that socioeconomic heterogeneity in the effect of health shocks offers one explanation for how the socioeconomic gradient in health arises.Health; Health Shocks; Socioeconomic Status; Life-cycle

Socioeconomic heterogeneity in the effect of health shocks on earnings: evidence from population-wide data on Swedish workers

In this paper, we test for the existence of socioeconomic heterogeneity in the effect of health shocks on labor market outcomes using register data on the total population of Swedish workers. We estimate fixed effect models and use unexpected hospitalizations as a measure of health shocks. Our results suggest large heterogeneity in the effects, where low educated individuals suffer relatively more from a given health shock. This result holds across a wide range of different health shocks and our results suggest that the heterogeneity increases by age. We test several potential explanations to these results. Extensive sensitivity analyses, including a difference-in-differences matching model, show that our estimates are robust to a number of potential threats. We conclude that socioeconomic heterogeneity in the effect of health shocks offers one explanation to why the socioeconomic gradient in health widens during middle ages.Health; health shocks; socioeconomic status; life-cycle

No Country for Fat Men? Obesity, Earnings, Skills, and Health among 450,000 Swedish Men

The negative association between obesity and labor market outcomes has been widely documented, yet little is known about the mechanisms through which the association arises. Using rich and unique data on 450,000 Swedish men enlisting for the military, we find that the crude obesity penalty in earnings, which amounts to about 18 percent, is linked to supply-side characteristics that are associated with both earnings and obesity. In particular, we show that the penalty reflects negative associations between obesity, on the one hand, and cognitive skills, non-cognitive skills, and physical fitness, on the other. Our results suggest that employers use obesity as a marker for skill limitations in order to statistically discriminate.obesity, overweight, earnings, cognitive ability, non-cognitive ability, health, physical fitness

The Height Premium in Earnings: The Role of Physical Capacity and Cognitive and Non-Cognitive Skills

The association between stature and favorable labor market outcomes has been extensively documented. Recent studies have attributed this height premium to cognitive and social skills. We offer an alternative explanation, where the premium mainly arises from the positive association between height and physical capacity. Accounting for the latter reduces the height premium by about 80 percent. By also accounting for cognitive and non-cognitive skills, we are able to explain the entire height premium. Our estimates are based on data from the military enlistment register that has been linked to earnings for the entire population of Swedish males aged 28-38 in 2003.earnings, height premium, cognitive and non-cognitive skills, physical capacity

The Intergenerational Transmission of Human Capital: Exploring the Role of Skills and Health Using Data on Adoptees and Twins

In this paper, we focus on possible causal mechanisms behind the intergenerational transmission of human capital. For this purpose, we use both an adoption and a twin design and study the effect of parents' education on their children's cognitive skills, non-cognitive skills, and health. Our results show that greater parental education increases children's cognitive and non-cognitive skills, as well as their health. These results suggest that the effect of parents' education on children's education may work partly through the positive effect that parental education has on children's skills and health.intergenerational transmission, human capital, education, health, cognitive skills, non-cognitive skills, adoptees, twins

Following in Your Father's Footsteps: A Note on the Intergenerational Transmission of Income between Twin Fathers and their Sons

We provide the first twin-based estimates of the intergenerational transmission of income between fathers and sons. Using Swedish register data on the income of monozygotic twin fathers and their sons, we are able to control for unobserved endowments at the twin-pair level when estimating the intergenerational relationship. We find a cross-sectional intergenerational income elasticity of 0.276, while our twin-based intergenerational income elasticity is 0.12. This is close to the estimate of 0.10 found by Björklund et al. (2006) using an adoption design. This suggests that at most half of the income transmission can be given a causal interpretation.twins, income, intergenerational transmission, intergenerational mobility