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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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BLACK DISMALAPOD
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Today, you are likely to spend a great deal of time waiting for visits from door-to-door solicitors hoping to buy either a rechargeable battery for your cell phone or a T-shirt commemorating the 2000 Olympics. Be on the lookout for telephone calls from long-lost relatives.
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The average bank teller loses about $250 every year.
"What gets measured gets done."

-- Peter Drucker, educator

PVR
Profit Volume Ratio
A PEDestrian's Guide
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