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LERNER INDEX: The difference between price (p) and marginal cost (mc) as a fraction of price, that is [p-mc]/p. The Lerner index is usually taken as an indicator of market power because the larger the index, the larger the difference between price and marginal cost, that is, the larger the distance between the price and the competitive price. The Lerner index depends on the elasticity of demand. The Lerner index is also called the price-cost margin.

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SELLERS' EXPECTATIONS, SUPPLY DETERMINANT

The expectations that sellers have concerning the future price of a good, which is assumed constant when a supply curve is constructed. If sellers expect a higher price, then supply decreases. If sellers expect a lower price, then supply increases. Sellers' expectations are one of five supply determinants that shift the supply curve when they change. The other four are resource prices, production technology, other prices, and number of sellers.

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Today, you are likely to spend a great deal of time at a flea market seeking to buy either a wall poster commemorating next Thursday or a pair of gray heavy duty boot socks. Be on the lookout for empty parking spaces that appear to be near the entrance to a store.
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In the Middle Ages, pepper was used for bartering, and it was often more valuable and stable in value than gold.
"Aerodynamically, the bumblebee shouldn't be able to fly, but the bumblebee doesn't know it so it goes on flying anyway. "

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