Nonrivalry has the implication that the efficient price is zero, since the marginal cost of another viewer is zero.
非竞争性意味着有效价格为零，因为增加一个观众的边际成本为零。
2
In addition, fireworks offer nonrivalry, in that one person's viewing of the display doesn't impinge significantly on another's viewing.
另外，烟花表演没有竞争性，即一个人观看烟花并不会明显影响其他人的欣赏。
3
A public good has two attributes: nonexcludability, which means the producer can't prevent the use of the good by others, and nonrivalry, which means that many people can use the good simultaneously.