The free markets tend to underproduce public goods

The most useful laws of behavior are those that

A) Predict behavior in the real world. B) Can be replicated in laboratory conditions. C) Are statistically accurate. D) Aid basic research.

Single-subject designs are useful when

A) we want an intensive study of an individual. B) we do not wish to make inferences about a population. C) we want to limit the conclusions to the individual. D) All of the above