The Effect of School Class Size on Post-Compulsory Education: Some Cost Benefit Analysis

This paper is concerned with the relationship between class size and the student outcome – length of time in post-compulsory schooling. Research on this topic has been problematic partly because omitted unobservables, like parents’ incomes and education levels, are likely to be correlated with class size. Two potential ways to resolve this problem are to exploit either experimental or instrumental variation. In both cases, the methods require that the variation in both class size and the outcome should not be contaminated by other unobservable factors that affect the outcome – like family background. An alternative approach, which we pursue here, is to take advantage of variation in class size between siblings which allows unobservable family effects to be differenced out. Our aim is to combine sibling differences with a fuzzy rule that determines class size to provide estimates of the effect of class size and use these to conduct an evaluation of the costs and benefits of a reduction in class sizes.class size, regression discontinuity, sibling differences

The effects of school class size on length of post-compulsory education: some cost-benefit analysis

This paper is concerned with the relationship between class size and the student outcome length of time in post-compulsory schooling. Research on this topic has been problematic partly because omitted unobservables, like parents' incomes and education levels, are likely to be correlated with class size. Two potential ways to resolve this problem are to exploit either experimental or instrumental variation. In both cases, the methods require that the variation in both class size and the outcome should not be contaminated by other unobservable factors that affect the outcome - like family background. An alternative approach, which we pursue here, is to take advantage of variation in class size between siblings which allows unobservable family effects to be differenced out. Our aim is to provide estimates of the effect of class size and use these to conduct an evaluation of the costs and benefits of a reduction in class sizes

Replication data for: Happy Doctor Makes Happy Baby? Incentivizing Physicians Improves Quality of Prenatal Care

N/

Daycare Enrollment Age and Child Development

Many parents return to work, placing their child in nonparental care before the age of one. Using variations in daycare vacancy rates, we estimate the causal effects of enrollment age in universal daycare on child development. In general, we find no evidence that earlier enrollment harms early child development, except for a temporary health shock. Children who enter later initially have fewer primary care visits, but the effects fade in preschool. Conversely, the results suggest some positive effects of early enrollment. Children who enter daycare later are more likely to demonstrate inadequate language skills by age five, particularly among boys

Daycare enrollment age and child development

A large share of young mothers return to work before their child turns one year. Exploiting exogenous variation in daycare vacancy rates, we estimate the causal effects of enrollment age in universal daycare on child development for children younger than two years. We find modest effects of postponing daycare enrollment on early childhood outcomes. Children who enroll later have fewer visits to their primary care physician in their first years of daycare, but the effects vanish before preschool. Children who enroll later are also more likely to have insufficient language proficiency at age five and thus need additional language support

Does more schooling reduce hospitalization and delay mortality? New evidence based on danish twins

Schooling generally is positively associated with better health-related outcomes—for example, less hospitalization and later mortality—but these associations do not measure whether schooling causes better health-related outcomes. Schooling may in part be a proxy for unobserved endowments—including family background and genetics—that both are correlated with schooling and have direct causal effects on these outcomes. This study addresses the schooling-health-gradient issue with twins methodology, using rich data from the Danish Twin Registry linked to population-based registries to minimize random and systematic measurement error biases. We find strong, significantly negative associations between schooling and hospitalization and mortality, but generally no causal effects of schooling