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  2. Inferior good - Wikipedia

    en.wikipedia.org/wiki/Inferior_good

    Good X is an inferior good since the amount bought decreases from X1 to X2 as income increases. In economics, inferior goods are those goods the demand for which falls with increase in income of the consumer. So, there is an inverse relationship between income of the consumer and the demand for inferior goods. [1]

  3. Goods - Wikipedia

    en.wikipedia.org/wiki/Goods

    Economics focuses on the study of economic goods, or goods that are scarce; in other words, producing the good requires expending effort or resources. Economic goods contrast with free goods such as air, for which there is an unlimited supply.

  4. Giffen good - Wikipedia

    en.wikipedia.org/wiki/Giffen_good

    the good in question must be an inferior good, there must be a lack of close substitute goods, and; the goods must constitute a substantial percentage of the buyer's income, but not such a substantial percentage of the buyer's income that none of the associated normal goods are consumed.

  5. Luxury goods - Wikipedia

    en.wikipedia.org/wiki/Luxury_goods

    In economics terminology, all goods with an income elasticity of demand greater than zero are "normal", but only the subset having income elasticity of demand > 1 are "superior". [7] Some articles in the microeconomics discipline use the term superior good as an alternative to an inferior good, thus making "superior goods" and "normal goods ...

  6. Income–consumption curve - Wikipedia

    en.wikipedia.org/wiki/Income–consumption_curve

    In economics and particularly in consumer choice theory, the income-consumption curve (also called income expansion path and income offer curve) is a curve in a graph in which the quantities of two goods are plotted on the two axes; the curve is the locus of points showing the consumption bundles chosen at each of various levels of income.

  7. Excludability - Wikipedia

    en.wikipedia.org/wiki/Excludability

    In economics, excludability is the degree to which a good, service or resource can be limited to only paying customers, or conversely, the degree to which a supplier, producer or other managing body (e.g. a government) can prevent consumption of a good. In economics, a good, service or resource is broadly assigned two fundamental ...

  8. SEC classification of goods and services - Wikipedia

    en.wikipedia.org/wiki/SEC_classification_of...

    An experience good is a product or service where product characteristics, such as quality or price, are difficult to observe in advance, but these characteristics can be ascertained upon consumption. The concept is originally due to Philip Nelson , who contrasted an experience good with a search good .

  9. Substitute good - Wikipedia

    en.wikipedia.org/wiki/Substitute_good

    Substitute goods are commodity which the consumer demanded to be used in place of another good. Economic theory describes two goods as being close substitutes if three conditions hold: [3] products have the same or similar performance characteristics; products have the same or similar occasion for use and; products are sold in the same ...