If the marginal private cost of running a car is $0.30 a mile and the marginal external cost is $0.10, what is the marginal social cost?

Fast food is faster and cheaper than a similar meal you could prepare for yourself. Which of the following does not explain that fact?

a. meal preparation has been divided into many separate tasks b. larger-scale production allows the introduction of more efficient machines c. workers gain productivity at a task over time d. there is less time lost moving from one task to another e. workers are more productive when they are being paid

Property rights need to be secure

A) to promote economic development. B) to encourage environmentalism. C) to promote an equal distribution of income. D) all of these choices.