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TR: The abbreviation for total revenue, which is the revenue received by a firm for the sale of its output. Total revenue is one of two parts a firm needs for the calculation of economic profit, the other is total cost. In general, total revenue is the price received for selling a good times the quantity of the good sold at that price. For a perfectly competitive firm, which receives a single unchanging price for all output sold, the calculation is relatively easy. For other real world firms, that charge different prices to different buyers for different quantities, the calculation can be more complex.

Total revenue is very important in the analysis a firm's short-run production decision. Two other revenue measures directly related to total cost are average revenue and marginal revenue. Total revenue is often depicting as the total revenue curve. For a perfectly competitive firm, the total revenue curve is a straight line from the origin. For a monopoly, oligopoly, or monopolistically competitive firm, the total revenue curve is "hump-shaped," increasing at a decreasing rate, reaching a peak, then declining.

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MARKET FOR LEMONS

A market adversely selects only lower quality products for exchange. The market for lemons is an illustration of adverse selection that results from asymmetric information. In this market, because buyers have limited information they offer an average price based on the average quality of the goods. Sellers, however, with better information select to sell lower quality products but not higher quality ones. Two methods of address this problem are signalling and screening. Two related information problems are moral hazard and the principal-agent problem.

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Today, you are likely to spend a great deal of time at a crowded estate auction trying to buy either a wall poster commemorating yesterday or pink cotton balls. Be on the lookout for neighborhood pets, especially belligerent parrots.
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There were no banks in colonial America before the U.S. Revolutionary War. Anyone seeking a loan did so from another individual.
"Being defeated is only a temporary condition; giving up is what makes it permanent."

-- Marilyn vos Savant, Author

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