Over in the meadow by the old Scotch pine Lives an old mother duck and her little ducklings nine. "Paddle!" said the mother. "We paddle!" said the nine. So they paddled all day by the old Scotch pine.1 [In nature there is] continual fear, and danger of violent death; and the life of man,...

There is no more important issue in the economics of the family than the impact of parents on the behavior of their children. By providing rewards and imposing constraints, parents seek to affect their children's behavior. The explanation of these actions is that the child's conduct directly...