According to utility theory, when total utility reaches a maximum, then marginal utility is:

The imaginary figure who advises us whether society is making the most of its scarce resources is the

A) opportunity-cost pixie. B) benevolent social planner. C) scarcity goddess. D) compassionate dictator.

If Y = $500 billion, autonomous consumption = $300 billion, and the marginal propensity to save = 0.20, then saving will equal:

a. ?$200 billion. b. $200 billion. c. ?$100 billion. d. $100 billion. e. $40 billion.