Answer:
When a good is said to be Excludable, it means that it's access can be restricted to being used by only a certain number of people.
Similarly Non-Excludable is the opposite.
And when a good is said to be Rival in Consumption, it means that when it is used, it reduces the chances of other being able to use the good because it is being depleted.
Non - Rival means the opposite.
Public Goods
These goods are said to be Non-Rival and Non - Excludable. Their use by one person does not deplete it for another and it's access cannot be restricted to certain people.
Private Goods
These Goods are both Rival and Excludable.
Club Goods
These goods are Non-Rival in nature, but they are Excludable.
Common Resource
These are Rival goods but they are Not - Excludable.
Public swimming pools with free admission during summer. - <em>Common Resource </em>
Public Pools are rival goods because when they are used by people, the quality reduces and more treatment or water will have to be added to maintain it. It is Non-Excludable however because it is open to all with free entrance.
Flood control - <em>Public Good </em>
Flood control is a state sponsored program aimed at helping everyone in the country or rather the affected area. It is non-excludable and non-rival in nature.
Private security patrol with idle officers - <em>Club Resource </em>
This is a club resource because the security provided is non - rival in that it does not get depleted. However because they are private, they only protect certain people which makes it Excludable in nature.
Public basketball courts - <em>Common Resource </em>
Anyone can use Public Courts thereby making them Non-Excludable. However, the more people that use the courts, the more damaged it gets making it Rival in nature.
Flu vaccine - <em>Private Good </em>
Flu vaccines are Rival in Consumption in that every flu vaccine given to one person reduces the amount of flu vaccine available for others. It is also Excludable because not all people get it as it is free up to a certain age and then has to be paid for.
