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January 13, 2026 

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DEMAND INCREASE AND SUPPLY DECREASE: A simultaneous increase in the willingness and ability of buyers to purchase a good at the existing price, illustrated by a rightward shift of the demand curve, and a decrease in the willingness and ability of sellers to sell a good at the existing price, illustrated by a leftward shift of the supply curve. When combined, both shifts result in an indeterminant change in equilibrium quantity and an increase in equilibrium price.

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PRODUCT DIFFERENTIATION: Real of perceive differences among similar goods that prompt buyers to pay different prices. Product differentiation is a method used by some firms to achieve market control. The three methods of product differentiation are physical differences, perceived differences, and support services. The greater the differentiation is among products, then the more ability firms have to exert control over prices. Product differentiation is perhaps most important for market control by firms in monopolistic competition, but it also plays a role in oligopoly.

     See also | market control | monopolistic competition | oligopoly | market structure |


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PRODUCT DIFFERENTIATION, AmosWEB GLOSS*arama, http://www.AmosWEB.com, AmosWEB LLC, 2000-2026. [Accessed: January 13, 2026].


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AVERAGE PRODUCT AND MARGINAL PRODUCT

A mathematical connection between average product and marginal product stating that the change in the average product depends on a comparison between the average product and marginal product. If marginal product is less than average product, then average product declines. If marginal product is greater than average product, then average product rises. If marginal product is equal to average product, then average product does not change.

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Today, you are likely to spend a great deal of time at a dollar discount store hoping to buy either a blue mechanical pencil or super soft, super cuddly, stuffed animals. Be on the lookout for crowded shopping malls.
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