公共品具备两种特征：一、非排它性：即生产者无法排除购买者以外的其他人使用这一产品，二、非竞争性：意指许多人可以同时使用该产品。
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.
专业化经济与范围经济的权衡最终确定最优分工水平；从非排它性要素的配置说明了范围经济对分工的限制。
We also conclude that the level of division of labor is determined by the Trade off between economies of specialization and economies of scope.
专业化经济与范围经济的权衡最终确定最优分工水平；从非排它性要素的配置说明了范围经济对分工的限制。
We also conclude that the level of division of labor is determined by the Trade off between economies of specialization a...
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