The availability of child-care services has often been advocated as one of the instruments to counter the fertility decline observed in many high-income countries. In the recent past large inflows of lowskilled migrants have substantially increased the supply of child-care services. In this...

The availability of child-care services has often been advocated as one of the instruments to counter the fertility decline observed in many high-income countries. In the recent past large inflows of low-skilled migrants have substantially increased the supply of child-care services. In this...

The 2D:4D digit ratio, the ratio of the length of the 2nd digit to the length of the 4th digit, is often considered a proxy for testosterone exposure in utero. A recent study by Nicolaou et al. (2018) reported an association between the lefthand 2D:4D and self-employment (in a sample of about...