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GIFFEN GOOD: A rare type of good seldom seen in the real world, in which a change in price causes quantity demanded to change in the same direction (in violation of the law of demand). In other words, an increase in the price of a Giffen good results in an increase in the quantity demanded. The existence of a Giffen good requires the existence of special circumstances. First, the good must be an inferior good. Second, the income effect triggered by a change in price must overwhelm the substitution effect. A Giffen good is most likely to result when the good is a significant share of the consumer's budget.
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MARKET SHARE The fraction of an industry's total sales or some other activity accounted for by one or more firms in the industry. An individual firm is often concerned with its "share of the market" as an indication of "success." Market share is also key to the analysis of market structure, market control, and industry concentration--especially for oligopoly. It can be used to indicated the degree concentration and market control of one or more firms in an industry. It can be used alone or to calculate concentration ratios and the Herfindahl index.
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PINK FADFLY
[What's This?]
Today, you are likely to spend a great deal of time wandering around the shopping mall looking to buy either a large, stuffed giraffe or a birthday greeting card for your aunt. Be on the lookout for neighborhood pets, especially belligerent parrots.
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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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"Every generation of Americans needs to know that freedom exists not in doing what we like, but in having the right to do what we ought. " -- Pope John Paul II
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IGARCH
Integrated Generalized Autoregressive Conditional Heteroskedasticity
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