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RESOURCE PRICES: One of the five supply determinants assumed constant when a supply curve is constructed, and that shift the supply curve when they change. The other four are technology, other prices, sellers' expectations, and number of sellers. Resource prices, the prices paid to use the factors of production (labor, capital, land, and entrepreneurship) affect production cost and thus producers' ability to sell goods. In general, if sellers face higher resource prices, then they have less ABILITY to sell goods.

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FOUR-FIRM CONCENTRATION RATIO

The proportion of total output in an industry produced by the four largest firms in an industry. This is one of two common concentration ratios. The other is the eight-firm concentration ratio. Another related measure is the Herfindahl index. The four-firm concentration ratio is commonly used to indicate the degree to which an industry is oligopolistic and the extent of market control held by the four largest firms in the industry.

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Today, you are likely to spend a great deal of time lost in your local discount super center seeking to buy either a replacement remote control for your television or a replacement nozzle for your shower. Be on the lookout for the last item on a shelf.
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Two and a half gallons of oil are needed to produce one automobile tire.
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