Which one of the following is included in M2 but NOT in M1?

For a kinked demand curve, the marginal revenue curve is:

a. positively sloped. b. a horizontal line. c. a vertical line. d. discontinuous. e. above the demand curve.

Advocates of discretionary policy make these criticisms of the economy's "self-correcting" mechanism:

a. it is slow b. it is not very reliable c. it works only when supplemented by automatic stabilizers d. All of the above are correct. e. a and b only are correct.