Economics - A public good is one which is non rival in consumption and non excludable

... Mohamed Subhi Economics A public good is one which is non rival in consumption and non excludable. This means that one persons consumption does not reduce the amount available for someone else and once the good or service is provided the producer is unable to prevent anyone from consuming it e.g. street lighting, a park etc. Public goods are provided free at the point of use but have typically already been paid for through taxation. The opposite of a public food is a private good because a consumer can be excluded from using it and a price has to be paid at the point of use e.g. entry to a rock concert, private healthcare. Merit goods are good which are socially desirable e.g. education, health etc. Demerit goods are goods that are socially undesirable and are negative for society e.g. alcohol, drugs, cigarettes etc. A merit good is a socially desirable good; in this case

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