Public Goods:Public goods are commodities or services that are available to all members of a society, regardless of individual payment. They are non-excludable and non-rivalrous, meaning everyone can access them without reducing the availability for others.
Externalities:Externalities are the positive or negative effects of an economic activity that are experienced by parties not directly involved in the transaction. They can influence the production and consumption of private goods.
Market Failure: Market failure occurs when the free market fails to allocate resources efficiently, leading to a suboptimal outcome. This can happen with private goods due to factors like externalities, information asymmetries, or lack of competition.