
Source: Why Men Earn More (2005), p. 79.
Source: Why Men Earn More (2005), p. 123.
Source: Why Men Earn More (2005), p. 79.
the option to raise children, or to not take a hazardous job
Source: Why Men Earn More (2005), p. 11.
Source: Father and Child Reunion (2001), p. 98.
Source: Why Men Are the Way They Are (1988), p. 360.
Source: Father and Child Reunion (2001), p. 115.
Source: 1930s, Sex and Temperament in Three Primitive Societies (1935), p. 140