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AAUP: The abbreviation for American Association of University Professors, which is an association of university and college faculty established in 1915 to protect academic freedom. The AAUP is the closest thing university faculty have to a labor union. While it does engage in some collective bargaining functions with specific universities, similar to traditional labor unions, its primary function is to ensure that faculty maintain intellectual or academic freedom from political of social pressures.
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                           BUYERS' INCOME, DEMAND DETERMINANT: The income that buyers have available to purchase a good, which is assumed constant when a demand curve is constructed. Buyers' income is one of five demand determinants that shift the demand curve when they change. The other four are buyers' preferences, other prices, buyers' expectations, and number of buyers. Buyers' income affects the ability to purchase a good. In general, income has a direct affect on the ability to buy a good, that is, more income means more buying. However, income can actually affect demand in two ways. For normal goods, more income means more demand. For inferior goods, however, more income means less demand.Normal and InferiorWhen it comes to the buyers' income demand determinant, goods fall into one of two types--normal and inferior.- Normal Good: A normal good exists when buyers are inclined to buy more of the good if they have more income. A normal good is so named because it represents the typical, or "normal" situation. An increase in income means buyers have a greater ability to purchase goods. As such, buyers are "normally" inclined to buy more if they have more income.
- Inferior Good: An inferior good exists when buyers are inclined to buy less of the good if they have more income. An inferior good is so named because it tends to be less expensive than more desirable goods. As such, when buyers have more income and can afford to buy the more expensive products, then they reduce their purchases of the inferior goods.
Shifting the Demand Curve| Buyers' Income | 
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A change in buyers' income causes the demand curve to shift. This can be illustrated using the negatively-sloped demand curve for Wacky Willy Stuffed Amigos presented in this exhibit. This demand curve captures the specific one-to-one, law of demand relation between demand price and quantity demanded. Buyers' income is assumed to remain constant with the construction of this demand curve.Now, consider how changes in buyers' income shifts the demand curve. The demand curve is affected in a different way for normal goods than for inferior goods. - Normal Good: An increase in buyers' income causes an increase in demand and a rightward shift of the demand curve for a normal good. Click the [Income Increase] button under the Normal Good heading to demonstrate.
A decrease in buyers' income causes a decrease in demand and a leftward shift of the demand curve for a normal good. Click the [Income Decrease] button under the Normal Good heading to demonstrate.
- Inferior Good: An increase in buyers' income causes a decrease in demand and a leftward shift of the demand curve for an inferior good. Click the [Income Increase] button under the Inferior Good heading to demonstrate.
A decrease in buyers' income causes an increase in demand and a rightward shift of the demand curve for an inferior good. Click the [Income Decrease] button under the Inferior Good heading to demonstrate.
Not the Income EffectThe buyers' income demand determinant needs to be distinguished from a seemingly similar notion, the income effect.- Buyers' Income Demand Determinant: Buyers' income is a demand determinant that affects the ability to purchase a good, given no change in the price of the good. The change in buyers' income causes a change in demand and a shift of the demand curve. With the buyers' income demand determinant, price is fixed and income changes.
- Income Effect: The income effect results from a change in demand price, which affects the purchasing power of a given amount of income. The change in purchasing power then causes a change in quantity demanded and a movement along the demand curve. With the income effect, price changes and income is fixed.
Recommended Citation:BUYERS' INCOME, DEMAND DETERMINANT, AmosWEB Encyclonomic WEB*pedia, http://www.AmosWEB.com, AmosWEB LLC, 2000-2025. [Accessed: July 1, 2025].
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BLUE PLACIDOLA
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Today, you are likely to spend a great deal of time at a flea market hoping to buy either a birthday greeting card for your grandmother or a coffee cup commemorating yesterday. Be on the lookout for vindictive digital clocks with revenge on their minds.
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Potato chips were invented in 1853 by a irritated chef repeatedly seeking to appease the hard to please Cornelius Vanderbilt who demanded french fried potatoes that were thinner and crisper than normal.
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"Experience keeps a dear school, but fools will learn in no other. " -- Benjamin Franklin
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ECU
European Currency Unit
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