This concept is an extension of Samuelson's notion of public goods to the economics of globalisation.
The theoretical concept of public goods does not distinguish with regard to the geographical region in which a good may be produced or consumed. However some theorists (such as Inge Kaul) use the term global public good to mean a public good which is non-rival and non-excludable throughout the whole world, as opposed to a public good which exists in just one national area. Knowledge is a canonical example of a global public good.[Joseph E. Stiglitz, Knowledge as a Global Public Good in Global Public Goods, ISBN-13: 978-0-19-513052-2.]