The assumption that individuals will not intentionally make decisions that will leave them worse off is known as

After researching the effectiveness of child safety seats in reducing the accident death rate of children ages one to four, economist Steven Levitt found that

A) for children under age four, safety seats are safer than any alternative. B) for children under age two, safety seats are safer than any alternative, but beyond age two, they provide no appreciable benefit over standard car seat belts. C) safety seats are actually more dangerous than standard car seat belts for children of any age. D) safety seats provide no appreciable benefit over standard car seat belts for children of any age.

Households ________ factors of production and ________ goods and services

A) demand; supply B) demand; demand C) supply; supply D) supply; demand