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VERTICAL ADDITION: In graphical analysis, the technique of combining two curves by adding the value of the variable on the vertical or Y axis for a given value of the variable on the horizontal or X axis. This is commonly used for deriving the demand curve for a public good from a set of individual demand curves. The demand price that each individual buyer is willing to pay is added for a given quantity to identify the total benefits obtained.

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PERFECT COMPETITION, LONG-RUN PRODUCTION ANALYSIS

In the long run, a perfectly competitive firm adjusts plant size, or the quantity of capital, to maximize long-run profit. In addition, the entry and exit of firms into and out of a perfectly competitive market guarantees that each perfectly competitive firm earns nothing more or less than a normal profit. As a perfectly competitive industry reacts to changes in demand, it traces out positive, negative, or horizontal long-run supply curve due to increasing, decreasing, or constant cost.

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APLS

BLACK DISMALAPOD
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Today, you are likely to spend a great deal of time searching for a specialty store looking to buy either any book written by Isaac Asimov or a how-to book on building remote controlled airplanes. Be on the lookout for deranged pelicans.
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Only 1% of the U.S. population paid income taxes when the income tax was established in 1914.
"I have no expectation of making a hit every time I come to bat. What I seek is the highest possible batting average."

-- President Franklin Delano Roosevelt

CPI-U
Consumer Price Index-All Urban Consumers
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