Reserving a share of the parental leave period for fathers is considered necessary for inducing fathers to take leave, and for men's increased participation in child-rearing. We investigate how a parental leave reform directed towards fathers impacted leave taking, and in turn children's and parents' long term outcomes. A paternal leave quota greatly increases the share of men taking paternity leave. We nd evidence that children's school performance improves as a result, particularly in families where the father has higher education than the mother. We nd no evidence that paternity leave counters the traditional allocation of parents' labor supply.