TF 6. Adjusting the concentration of sweet versus sour enabled rats to have a large negative income effect for sour water.

TF 7. No law can benefit somebody without making somebody else worse off, compared to a win-win percentage of 70 - 80 % resulting from imperfect voluntary trading.

TF 8. After an industry is controlled by a federal regulatory agency, companies in the industry can maintain their long run viability by continuing to focus on making better products or services.