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September 28, 2023 

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WPI: The abbreviation for Wholesale Price Index, which is an index of the prices paid by retail stores for the products they would ultimately resell to consumers. The Wholesale Price Index, abbreviated WPI, was the forerunner of the modern Producer Price Index (PPI). The WPI was first published in 1902, and was one of the more important economic indicators available to policy makers until it was replaced by the PPI in 1978. The change to Producer Price Index in 1978 reflected, as much as a name change, a change in focus of this index away from the limited wholesaler-to-retailer transaction to encompass all stages of production. While the WPI is no longer available, the family of producer price indexes provides a close counterpart in the Finished Goods Price Index.

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PERFECT COMPETITION CHARACTERISTICS: The four key characteristics of perfect competition are: (1) large number of small firms, (2) identical products sold by all firms, (3) freedom of entry into and exit out of the industry, and (4) perfect knowledge of prices and technology. These four characteristics mean that a given perfectly competitive firm is unable to exert any control whatsoever over the market.

     See also | perfect competition | assumption | mobility | industry | firm | technology | market | price taker | price maker | substitute | resources | barrier to entry | perfect competition and demand | perfect competition and efficiency | perfect competition and short-run supply curve | monopoly | monopolistic competition | oligopoly |


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SELF CORRECTION, MARKET

The automatic process in which markets adjust from disequilibrium to equilibrium. With this self-correction process, the market price either increases or decreases in response to a shortage or a surplus to restore the balance between quantity demanded and quantity supplied. This process works automatically to achieve equilibrium without the need for outside intervention, such as government regulation.

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Today, you are likely to spend a great deal of time searching for rummage sales seeking to buy either a flower arrangement with anything but tulips for your grandfather or a birthday greeting card for your mother that doesn't look like a greeting card. Be on the lookout for vindictive digital clocks with revenge on their minds.
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Helping spur the U.S. industrial revolution, Thomas Edison patented nearly 1300 inventions, 300 of which came out of his Menlo Park "invention factory" during a four-year period.
"The way employees treat customers reflects the manner in which they're treated by management. "

-- James Perkins, president, Cornell University

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Integrated Generalized Autoregressive Conditional Heteroskedasticity
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