Public Goods:Public goods are commodities or services that are non-rival and non-excludable, meaning that one person's consumption does not reduce the availability for others, and it is not feasible to exclude individuals from accessing them.
Market Failure:Market failure occurs when the free market fails to allocate resources efficiently, leading to a suboptimal outcome for society. This is often the case with public goods, where the private market underproduces or fails to provide them.
Pareto Efficiency:Pareto efficiency is a state of resource allocation where it is impossible to make one person better off without making at least one other person worse off. Optimal provision of public goods aims to achieve a Pareto efficient outcome.