What are Public goods and demerit goods and not for sale goods?

In economics, a public good is a good that is non-rivaled and non-excludable. This means, respectively, that consumption of the good by one ...


en.wikipedia.org/wiki/Public_goods





In economics, a demerit good is a good or service whose consumption is considered unhealthy, degrading, or otherwise socially undesirable due to ...


en.wikipedia.org/wiki/Demerit_goods





Not for sale goods i cant help with im afraid.

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