The occurrence of twin births has been widely used as a natural experiment. With a focus upon the use of twin births for identification of causal effects in economics, this chapter provides a critical review of methods and results.

Using data of adult women from the German Socio-Economic Panel (SOEP), we find that risk tolerance is associated with a higher probability of an out-of-partnership birth. In contrast, we find no association between risk tolerance and the probability of a cohabiting birth.

Accurate demographic data are essential for effective policy design, yet private costs may deter individuals from truthfully reporting sensitive information. We examine this market failure and its implications in the context of child motherhood. Using administrative records from Brazil, Mexico,...

We investigate the effect of having a child on parents' criminal behavior using rich administrative data from Brazil. Fathers' criminal activity sharply increases by up to 10% during the pregnancy period, and by up to 30% two years after birth, while mothers experience only a transitory decline...

We investigate the effect of having a child on parents’ criminal behavior using rich administrative data from Brazil. Fathers’ criminal activity sharply increases by up to 10% during the pregnancy period, and by up to 30% two years after birth, while mothers experience only a transitory...