d. All of the above.
When members of an oligopolistic industry agree to collude, raising their product price
substantially above average cost, the passage of time (months and years)
a. is usually needed for the members to solidify their cooperation.
b. usually results in finer control of prices and markets by the group and larger profit
margins.
c. is likely to erode the agreement, as ways to cheat are developed by some participants
and new entry is encouraged by the high price.
d. seldom has any impact on the agreement, as long as the participants maintain high
profit levels as a result of the agreement.
According to the principle of marginal productivity, if
a. the product price is less than marginal revenue product (MRP), the firm is using too
little of the input.
b. the price of an input rises, the quantity demanded of the input will increase.
c. MRP is greater than product price, the firm should reduce the use of the input.
d. price of the input equals MRP, the firm is maximizing profit.