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This article does not cite any references or sources. (January 2008) Please help improve this article by adding citations to reliable sources. Unverifiable material may be challenged and removed. |
In economics, normal goods are any goods for which demand increases when income increases, i.e. with a positive income elasticity of demand. The term does not necessarily refer to the quality of the good.
Depending on the indifference curves, the amount of a good bought can either increase, decrease, or stay the same when income increases. In the diagram below, good Y is a normal good since the amount purchased increases from Y1 to Y2 as the budget constraint shifts from BC1 to the higher income BC2. Good X is an inferior good since the amount bought decreases from X1 to X2 as income increases.
| Types of goods
public good - private good - common good - common-pool resource - club good - anti-rival goods (non-)durable good - intermediate good (producer good) - final good - capital good
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