Product differentiation forms the basic rationale for advertising expenditures by monopolistically competitive firms

A price increase for pizza will reduce the quantity of pizza demanded because it reduces a buyer's purchasing power. This is called :

a. income effect b. the alternative effect c. the substitution effect d. the normal good effect

Technological progress occurs when the economy gets more output:

A. without any more capital or labor. B. by using more capital per worker. C. by using more capital but not more workers. D. by using more labor but not more capital.