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Only if the two products satisfy the three conditions, will they be classified as close substitutes according to economic theory. The opposite of a substitute good is a complementary good, these are goods that are dependent on another. An example of complementary goods are cereal and milk. An example of substitute goods are tea and coffee.
Giffen goods should not be confused with Veblen goods: Veblen goods are products whose demand increases if their price increases because the price is seen as an indicator of quality or status. The classic example given by Marshall is of inferior quality staple foods , whose demand is driven by poverty that makes their purchasers unable to ...
An elastic good is one for which there is a relatively large change in quantity due to a relatively small change in price, and therefore is likely to be part of a family of substitute goods; for example, as pen prices rise, consumers might buy more pencils instead.
A submodular utility function is characteristic of substitute goods. For example, an apple and a bread loaf can be considered substitutes: the utility a person receives from eating an apple is smaller if he has already ate bread (and vice versa), since he is less hungry in that case. A typical utility function for this case is given at the right.
Nutrition (Per tbsp): Calories: 90 Fat: 10 g (Saturated Fat: 8 g) Sodium: 65 mg Carbs: 0 g (Fiber: 0 g, Sugar: 0 g) Protein: 0 g. According to Sabat, this plant-based butter from Miyoko's "is a ...
Complementary goods exhibit a negative cross elasticity of demand: as the price of goods Y rises, the demand for good X falls.. In economics, a complementary good is a good whose appeal increases with the popularity of its complement.
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I.e., the definition includes both substitute goods and independent goods, and only rules out complementary goods. See Gross substitutes (indivisible items) . References