Economic Terms

Is the famous English economist associated with Keynesian economics. The General Theory of Employment, Interest and Money (1936) is his most famous work.

A good which is purchased alongside another good as the combined outcome helps to satisfy a want or desire.

Below is a set of diagrams to illustrate joint demand in a demand and supply framework. In this instance an increase in demand for printers, similtaneously raises the demand for ink cartridges. This is because no individual can use a printer without accompanying ink cartridges so there has to be a joint demand for this product. The same intuition holds for razors and razor blades.

When a good is supplied as result of the supply of another good, typically because a number of goods can be produced from the same raw materials/process or if remnants from the production process can be used to produce something else.

Below is a set of diagrams to illustrate joint supply in a demand and supply framework. In this instance an increase in demand for beef, raises the price of beef and as a result increases the supply if beef due to higher profit incentives. If more beef is produced then this should increase the supply of leather as leather is produced from beef. Therefore beef and leather are in joint supply.