Twin births are often construed as a natural experiment in the social and natural sciences on the premise that the occurrence of twins is quasi-random. We present new population-level evidence that challenges this premise. Using individual data for more than 18 million births (more than 500,000...

Twin births are often construed as a natural experiment in the social and natural sciences on the premise that their occurrence is quasi-random. We present new population-level evidence challenging this premise. Using data on about 18 million births in 72 countries, we find that maternal...

Twin births are often used to instrument fertility to address (negative) selection of women into fertility. However recent work shows positive selection of women into twin birth. Thus, while OLS estimates will tend to be downward biased, twin-IV estimates will tend to be upward biased. This is...

In der vorliegenden Studie wird anhand von Daten einer prospektiven Längsschnittstudie (Mannheimer Risikokinderstudie) untersucht, welchen Beitrag die Qualität der Mutter-Kind-Interaktion (MKI) im Säuglingsalter zur Vorhersage kognitiver (IQ) und nicht-kognitiver Fähigkeiten (Persistenz) bis...

In this paper, we study the socio-economic determinants of birth weight with a focus on the mother's family status. We use Austrian birth register data covering all births between 1984 and 2007 and find that a mother's marriage is associated with a higher birth weight of the newborn in a range...

This paper uses microdata from Brazilian natality and mortality vital statistics between 2000 and 2010 to estimate the impact of in-utero exposure to local violence - measured by homicide rates - on birth outcomes. The estimates show that exposure to violence during the first trimester of...

This paper uses microdata from Brazilian natality and mortality vital statistics between 2000 and 2010 to estimate the impact of in-utero exposure to local violence – measured by homicide rates - on birth outcomes. The estimates show that exposure to violence during the first trimester of...

This paper investigates the intergenerational transmission of health in the very long run. Using a unique purpose-built administrative dataset on individuals born in Sweden between 1930–34 and their parents, we study the intergenerational transmission (IGT) of health and the impact of previous...