In Economics, What Is Positive Externality?

Also known as "external economy". Symmetry of "negative externalities". Production and consumption bring benefits to others without the beneficiaries having to pay for it. For example, the activities of beekeepers' bees bring benefits to fruit farmers, and fruit farmers do not have to pay for it. In the environmental field, it means that economic activities are beneficial to the environment, but the value of these benefits has not been realized through the market, resulting in private benefits less than social benefits, which has a deterrent effect on benign economic activities. Theoretically, society should compensate these producers so that private benefits and social benefits tend to coincide.