Mercantilists perceived trade as a zero sum game

In his 1951 book, Social Choice and Individual Values, Kenneth Arrow used the term "unanimity" to mean

a. A beats B only if everyone prefers A to B. b. if everyone prefers A to B, then A beats B. c. if A beats B and B beats C, then A must best C. d. everyone who is eligible to vote must vote; otherwise, the outcome is invalid.

Use the supply and demand model to explain why the salaries of nurses in increasing?

a. Demand has increased while supply also increased. b. Demand has increased while supply decreased. c. Demand has decreased while supply decreased. d. Demand has decreased while supply increased.