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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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IMPLICIT COST

An opportunity cost that does not involve a monetary payment or any other form of compensation. The monetary payment that is often made to compensate the person who initially foregoes the satisfaction is not made for implicit cost. There is no payment to transfer the burden of the opportunity cost from the original person to someone else. Implicit cost is also occasionally termed implicit opportunity cost.

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Today, you are likely to spend a great deal of time at a going out of business sale looking to buy either a cell phone case or a pair of designer sunglasses. Be on the lookout for broken fingernail clippers.
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The penny is the only coin minted by the U.S. government in which the "face" on the head looks to the right. All others face left.
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