Paul Samuelson is immensely famous among economists for having established the supply-side school of economics

Price discrimination by a monopolist is less effective if the

A) good can be resold. B) good has no substitutes. C) monopolist can identify buyers by willingness to pay. D) good cannot be resold.

If real consumption spending increases by $400 billion each time real disposable income rises by $1,000 billion, the marginal propensity to consume is

a. 40 b. 4 c. 0.4 d. 0.04 e. 0.004