Assume a consumer is currently purchasing a combination of goods, X and Y, that
maximizes her utility given her budget constraint, i.e., MRSX,Y = PX/PY. Now assume
that there is a decrease in the price of Y. In this case, to once again maximize her utility,
the consumer will want to adjust her purchases of X and Y such that:
A) the marginal rate of substitution of X for Y, i.e., MRSX,Y, decreases.
B) the marginal rate of substitution of X for Y, i.e., MRSX,Y, stays the same.
C) the marginal rate of substitution of X for Y, i.e., MRSX,Y, increases.
D) none of the above. The consumer will continue to maximize her utility after the price
change by continuing to consume the same combination of X and Y.
Diminishing marginal returns occur when:
A) units of a variable input are added to a fixed input and total product falls.
B) units of a variable input are added to a fixed input and marginal product falls.
C) the size of the plant is increased in the long run.
D) the quantity of the fixed input is increased and returns to the variable input fall.
Which of the following barriers to entry is is most likely to result in the creation of of
new products and production processes?