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SALES TAX: A tax on retail sales. This is major source of revenue for many state and local governments. Because poorer people tend to spend a larger share of their income on stuff covered by sales taxes, it tends to be a regressive tax. To reduce this regressiveness, some state and local governments excluded items like food and medicine.

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KINKED-DEMAND CURVE ANALYSIS

An analysis using the kinked-demand curve to explain rigid prices often found with oligopoly. The kinked-demand curve contains two distinct segments--one for higher prices that is more elastic and one for lower prices that is less elastic. Key to this analysis is that the corresponding marginal revenue curve contains three segments--one associated with the more elastic segment, one associated with the less elastic segment, and one associated with the kink. A profit-maximizing firm can then equate marginal cost to a wide range of marginal revenue values along the vertical segment of the marginal revenue curve. This suggests that marginal cost must change significantly before an oligopolistic firm is inclined to change price.

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ORANGE REBELOON
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Today, you are likely to spend a great deal of time lost in your local discount super center trying to buy either decorative picture frames or storage boxes for your income tax returns. Be on the lookout for vindictive digital clocks with revenge on their minds.
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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.
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