D. interaction of the supply and demand curves.
Suppose that consumers preferences are well behaved in that properties 4-1 to 4-4 are
satisfied. Furthermore, assume that both X and Y are normal goods and that the price of
good X increases. Then, which of the following effects is known with certainty?
A. The income and substitution effects reinforce one another, leading to an overall
increase in the consumption of good X.
B. The income and substitution effects reinforce one another, leading to an overall
decrease in the consumption of good X.
C. The income and substitution effects will have competing effects, leading to an
indeterminate impact on the consumption of good X.
D. The income and substitution effects will reinforce one another, leading to an overall
increase in the consumption of good Y.
Suppose that the inverse demand for a downstream firm is P = 150 – Q. Its upstream
division produces a critical input with costs of CU(Qd) = 5(Qd)2. The downstream firms
cost is Cd(Q) = 10Q. When there is no external market for the downstream firms critical
input, the downstream firm should produce:
A. 11.67 units.
B. 12.5 units.
C. 14 units.