Short-run contractions and expansions in economic activity are called

Throughout the twentieth century, and especially since the mid-1960s:

A. the labor force participation rates of women increased dramatically. B. the labor force participation rates of women have decreased dramatically. C. the labor force participation rates of women slowly increased. D. the labor force participation rates of women fluctuated wildly.

In the above figure, at the best affordable point, the marginal rate of substitution is

A) 0.5 of a hamburger per magazine. B) 1 hamburger per magazine. C) 1.33 hamburgers per magazine. D) 8 hamburgers per magazine.