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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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Lesson 7: Market | Unit 2: The Numbers Page: 7 of 22

Topic: Market Agreement <=PAGE BACK | PAGE NEXT=>

What would happen if we had different prices in the market?
  • At 10 cents, the quantity demanded is 800 tapes and the quantity supplied is 0 tapes. This is not a suitable price. The buyers can't buy all that they want.
  • At 90 cents, the quantity demanded is 0 tapes and the quantity supplied is 800 tapes. This is not a suitable price, either. The sellers can't sell all that they want.
  • Buyers or sellers are not satisfied at these prices and will take corrective action.
This is not equilibrium.

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DEMAND ELASTICITY AND TOTAL EXPENDITURE

The notion that price-induced changes in total expenditure (price times quantity) depend on the relative price elasticity of demand. If demand is relatively elastic, then changes in price cause total expenditure to change in the opposite direction. If demand is relatively inelastic, then changes in price cause total expenditure to change in the same direction. If demand is unit elastic, then changes in price do not cause any change in total expenditure.

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Today, you are likely to spend a great deal of time surfing the Internet looking to buy either a pair of designer sunglasses or looseleaf notebook paper. Be on the lookout for door-to-door salesmen.
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North Carolina supplied all the domestic gold coined for currency by the U.S. Mint in Philadelphia until 1828.
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