Women whose first child is a boy work less than women with first-born girls. After a first-born boy the probability that women have more children increases. Higher fertility is a possible explanation for the lower labor supply of mothers.

We investigate whether the costs of job displacement differ between blue and white collar workers. In the short-run earnings and employment losses are substantial for both groups but stronger for white collars. In the long run, there are only weak effects for blue collar workers but strong and...