What is the difference between Common Goods and Common Pool Resources? All this time I was thinking that common-pool resources are common goods, until I read this excerpt from a book.
Common pool resources can be depleted by overuse. 

For example, an area of communal grazing land would be a common pool resource because grazing too many animals decreases the amount of grass available to each animal. 

Wikipedia is a common good but are not a common pool resource - reading a lot of articles on Wikipedia does not reduce the number of articles available for everyone else to read.