From the 1960s to the early 1990s, marginal tax rates _____

If an employment situation is characterized by adverse selection,

a. there are too many applicants for each job b. there are too few applicants for each job c. there are exactly the right number of applicants for each job d. there is an excess supply of overqualified applicants for each job e. there is an excess supply of underqualified applicants for each job

If marginal revenue on the tenth unit of output equals $4 for a non-discriminating, profit-maximizing monopolist, then price: a. equals $4

b. is less than $4. c. is greater than $4. d. must be equal to average total cost.