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ACCESSIBILITY: The location of economic activity (especially in terms of land) relative to other activities. As real estate agents are prone to say, "The three most important factors in real estate are 'location, location, location.'" Accessibility determines how easy or difficult (read this as costly) it is to allocate good, services, and resources. Transportation is a key factor in accessibility. Efficient, low cost transportation systems improve accessibility.
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AD CURVE: The aggregate demand curve, which is a graphical representation of the relation between aggregate expenditures on real production and the price level, holding all ceteris paribus aggregate demand determinants constant. The aggregate demand, or AD, curve is one side of the graphical presentation of the aggregate market. The other side is occupied by the aggregate supply curve (which is actually two curves, the long-run aggregate supply curve and the short-run aggregate supply curve). The negative slope of the aggregate demand curve captures the inverse relation between aggregate expenditures on real production and the price level. This negative slope is attributable to the interest-rate effect, real-balance effect, and net-export effect. See also | aggregate demand | aggregate market | aggregate supply curve | aggregate expenditures | real production | price level | ceteris paribus | aggregate demand determinants | interest-rate effect | real-balance effect | net-export effect |
Recommended Citation:AD CURVE, AmosWEB GLOSS*arama, http://www.AmosWEB.com, AmosWEB LLC, 2000-2025. [Accessed: November 15, 2025].
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PRINCIPLE OF MINIMUM DIFFERENCES A principle stating that monopolistically competitive firms seek to maintain similarities between products at the same time they promote differences. Similarities enable substitutability, such that one firm can attract the buyers away from other firms. Differences enable uniqueness and market control, such that each firm has market control and is able to charge a higher price than achieved with perfect competition. This principle is also termed Hotelling's paradox.
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WHITE GULLIBON
[What's This?]
Today, you are likely to spend a great deal of time watching infomercials hoping to buy either a computer that can play video games and burn DVDs or a black duffle bag with velcro closures. Be on the lookout for florescent light bulbs that hum folk songs from the sixties.
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The 1909 Lincoln penny was the first U.S. coin with the likeness of a U.S. President.
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"Do something wonderful; people may imitate it. " -- Albert Schweitzer, theologian, physician
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JEP
Journal of Economic Perspectives
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