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What are the two lines of defense in our immune system?
Market
A system or an area where buyers and sellers interact to trade goods, services, or financial instruments.
Positive Externality
A benefit gained by a third party not directly involved in a transaction or activity, where the social or economic gain is not reflected in the market price.
Social Planner
A theoretical decision-maker in economics who aims to achieve optimal outcomes for society by considering the allocation of resources and distribution of goods and services.
Subsidy
A payment made by the government to a firm, industry, or individual, usually to encourage the production of a certain good or service or to reduce its price for consumers.
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