Define non-rivalry and give an example.

• A. Non-rivalry means one person’s consumption does not reduce another's; example: broadcast news.
• B. Non-rivalry means goods can be used by only one person at a time; example: private concert.
• C. Non-rivalry means consumption reduces others' use; example: shared cable.
• D. Non-rivalry means the good is excludable; example: toll road.

Answer: (A)

Non-rivalry means that one person’s use of a good does not reduce another person’s ability to use it. Broadcast news is a good example because many people can watch the same broadcast at the same time without diminishing anyone else’s access. The other descriptions describe rival goods (one person’s use reduces another’s, as in a private concert) or excludable goods (access can be restricted, like a toll road), which do not capture the non-rival nature.