8. Is barter more or less frequent now in America than formerly? In the world?
9. Is there any causal relationship between commerce and manufactures? If so, in what way?
10. In a time of high excitement gold was sold for more at one side of the room than at the other side; how account for this?
11. Give examples of, and reasons for, two prices in the same market.
12. What effect on prices should be expected from an invention that makes possible the carrying of fresh meat from South America to England?
13. Describe the method of selling any product you know about. What is the market in which it is sold?
Note.—See works cited: Smart, pp. 40-63; Böhm-Bawerk, 193-222; Wieser, 39-53.
Chapter 6. Psychic Income
1. Is it possible to compare the value of the portrait-painter's service with that of the gardener?