The Clean Air Act of 1972 required some companies to install the "best available" pollution control technologies. This is an example of:
a. the government using a subsidy to encourage a negative externality.
b. the government using the command approach to discourage a negative externality.
c. the government using the command approach to encourage a positive externality.
d. a marketable pollution permit.
e. a pollution tax.
b
You might also like to view...
The SAT (Scholastic Aptitude Test) is often used as a signaling device by colleges to find high- qualified students
High scores on this test can certainly communicate a lot of other qualities about a student that may make it an efficient sorting device. However, can you think of any reason why at least occasionally a high score might not signal the correct information?
In the infinitely-repeated Bertrand model:
A. firms play the Bertrand pricing game over and over, with no definite end. B. firms play the Bertrand pricing game one time. C. firms play the Bertrand pricing game several times, with a clearly defined endpoint. D. firms play the Bertrand pricing game at least two times, but no more than four.
Highway and home construction had a boom from
A. 1925-1940. B. 1935-1950. C. 1945-1960. D. 1965-1980.
Use the following graph to answer the question below. 
The graph shows that indifference curves are
A. transitive. B. concave. C. objective. D. increasing.