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ZERO SLOPE: A horizontal line in which the numerical value of the slope, calculated as the change in the variable on the vertical axis divided by a change in the variable on the horizontal axis, is zero. In other words, the Y-axis variable is fixed, or constant, for any and all values of the X-axis variable.

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DECREASING-COST INDUSTRY

A perfectly competitive industry with a negatively-sloped long-run industry supply curve that results because expansion of the industry causes lower production cost and resource prices. A decreasing-cost industry occurs because the entry of new firms, prompted by an increase in demand, causes the long-run average cost curve of each firm to shift downward, which decreases the minimum efficient scale of production.

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BLUE PLACIDOLA
[What's This?]

Today, you are likely to spend a great deal of time at a dollar discount store seeking to buy either a coffee cup commemorating the first day of winter or a video game player. Be on the lookout for attractive cable television service repair people.
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In the early 1900s around 300 automobile companies operated in the United States.
"Look at everything as though you were seeing it either for the first or last time. Then your time on earth will be filled with glory."

-- Betty Smith, Novelist

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