Which of the following are examples of externalities that are beneficial to bystanders,
people not direclty involved in the consumption or production of a good? Choose all that
are correct answers.
A
Thirty percent of middle school students get immunity from influenza by mingling with and attending classes with 70 percent of the
students who got flu shots, which were paid for by their parents.
B
Mike loves his dog a lot. However, when Mike walks his dog every afternoon, his dog stops in middle of the neighbor's lawn and poops!.
Mike never bothers to remove his pet's mess from his neighbor's lawn.
C
A young family and their toddler are unable to sleep at night because a loud noise from a party by the family's neighbors lasts unitl 3:00
a.m., CST.
D
A mining company near Lake Superior dumps the waste byproducts of its iron mining into Lake Superior, a source of tap water to city
dewellers. Many the city residents, nonowners of the company, become ill after drinking the contaminated tap water.
E
The scientic knowledge for making a medical technology becomes freely available, after the invetor's patent expires. New companies use
the free technological knowledge to produce and sell at huge profits a clone of the original technology.
