Markets tend to produce too little of an excludable public good because

The price paid for the use of borrowed money:

a. Ponzi payment b. deed bond c. interest d. millage note

There were large decreases in productivity during

A. the 1990s and early 2000s. B. the late 1980s. C. the late 1970s and the 2010s. D. the 1950s and 1960s.