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MARKET SHARE: The fraction of an industry's total sales accounted for by a single business. In general, market share is a "first-guess" indicator of a firm's market control. If, for example, a company has a market share of 100 percent (that is, a monopoly), then you can rest assured it has a substantial amount of market control. A company with a 25 percent market share has less, but still notable, market control. In fact, when you get right down to the bottom line, the phrase "market share" is only worth mentioning for oligopolistic firms with a significant degree of market control. There really is no market control for a monopolistically competitive firm with a 0.00000001 percent market share.

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TAX INCIDENCE

The portion of a tax paid by each side of a market based on differences in the pre-tax equilibrium price and the after-tax demand price and supply price. Because a tax drives a wedge between demand price and supply price, the incidence or burden of a tax typically falls on both buyers and sellers. How much each side pays depends on the relative price elasticity of demand and supply. Buyers pay the entire tax only in the case of a perfectly elastic supply or perfectly inelastic demand. Sellers pay the entire tax only in the case of a perfectly elastic demand or perfectly inelastic supply.

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APLS

BEIGE MUNDORTLE
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Today, you are likely to spend a great deal of time watching infomercials looking to buy either a desktop calendar with all federal and state holidays highlighted or a half-dozen helium filled balloons. Be on the lookout for a thesaurus filled with typos.
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The Dow Jones family of stock market price indexes began with a simple average of 11 stock prices in 1884.
"A stumble may prevent a fall. "

-- Margaret Thatcher, British prime minister

ARIMA
Autoregressive Integrated Moving Average
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