Public Goods:Public goods are goods or services that are non-rival and non-excludable, meaning that one person's consumption does not diminish the availability for others, and it is difficult to exclude people from using them.
Private Goods:Private goods are goods that are rival in consumption and excludable, meaning that one person's consumption diminishes the availability for others, and the provider can limit access to the good.
Common-Pool Resources: Common-pool resources are resources that are rival in consumption but non-excludable, meaning that one person's use diminishes the availability for others, but it is difficult to exclude people from using them.