The total revenue of a purely competitive firm from 8 units of output is $48. Based on this information, total revenue for 9 units of output must be:

According to estimates by Richard Vedder, rates of exploitation for slaves:

a. are similar to those of antebellum manufacturing workers. b. indicate that slaves received nearly the full marginal value product of their labor. c. equaled 50-65 percent of their value marginal product. d. cannot be determined due to inadequate data on maintenance costs of adult slaves.

Under a marketing quota system,

A) the government sets a limit on the quantity of a product that a farmer is allowed to bring to market. B) farmers are paid to take part of their land out of cultivation. C) farmers are given limits as to the number of acres that can be used to produce a particular product. D) farmers are paid the difference between the market price of their product and a governmentally determined price that would maintain an established price parity. E) the government establishes a minimum price that farmers will be paid for their product, which causes the farmers to cut back on the number of acres planted.