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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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Lesson 3: Scarcity | Unit 3: Opportunity Cost Page: 11 of 17

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  • The basic concept of opportunity cost as the highest valued alternative foregone in the pursuit of an activity.
  • How the fact that limited resources have alternative uses intertwines the notion of opportunity cost and the basic problem of scarcity.
  • Why economic cost is synonymous with opportunity cost.
  • Why opportunity cost need not be measured in money terms.
  • The difference between explicit and implicit opportunity cost.

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PRODUCER SURPLUS

The revenue that producers obtain from a good over and above the price paid. This is the difference between the minimum supply price that sellers are willing to accept and the price that they actually receive. A related notion from the demand side of the market is consumer surplus.

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The 22.6% decline in stock prices on October 19, 1987 was larger than the infamous 12.8% decline on October 29, 1929.
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