In year 1 the average price of X is $10, and in year 2 the average price of X is $23. If
consumers buy more units of X in year 2 than in year 1, it follows that
a. the law of supply does not hold for good X.
b. demand for good X could be higher in year 2 than in year 1.
c. supply of good X could be less in year 2 than in year 1.
d. good X buyers have received an increase in income between year 1 and year 2, and
good X is a normal good.
e. b and d
Which of the following situations is clearly and unambiguously descriptive of a positive
externality?
a. Jack feels better after his daily walk.
b. Joriel studies harder than anyone in his class.
c. Professor Gomez gave an unannounced quiz to her history class yesterday.
d. The President of the United States yesterday signed a legislative act that is very
popular in the country.
e. none of the above