Which of the following is an example of barter?
A. Natalie buys gum at a convenience store and tells the cashier to keep the dollar change.
B. Keisha takes care of the neighbor's children, and the neighbor mows Keisha's yard as repayment.
C. Jordan buys eggs with Canadian dollars from Ryan's Grocery, and Ryan buys gas from Jordan's Gas Station with Japanese yen.
D. Nicki uses her mom's credit card to purchase her textbooks online.
Answer: B
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When network externalities are present:
A. a person's demand cannot be affected by the number of other people who have purchased the good. B. we can obtain the market demand curve simply by summing individuals' demands. C. one person's demand also depends on the demands of other people. D. the social cost of production is larger than the private cost
When a unit tax is placed on suppliers they are generally able to _____
a. lobby to get the tax repealed b. shift the tax payment to the demanders c. shift part of the tax burden to the demanders in the form of a secondary tax d. shift part of the tax burden to the demanders in the form of a higher price