Starting from a base (or reference) year, a price index Pt represents the price of the commodity bundle over time t. In base year zero, P0 is set to 100. If for example the base year is 1992, real values are expressed in constant 1992 dollars, based at 100 for 1992. Also imagine for example, that the price of the commodity bundle has increased in the first year by 1%, then Pt rises from P0 = 100 to P1 = 101.
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WASHINGTON â Today, the U.S. Postal Service introduced the Global Forever First-Class Mail International stamp. Priced at $1.10 each and offered in a pane of 20, the Global stamp offers a single price for any First-Class Mail International 1-ounce letter to any country in the world. The Global stamp also may be used to mail a 2-ounce letter to Canada. Customers may purchase the stamps at usps.com/stamps, by phone at 800-STAMP24 (800-782-6724) and at Post Offices nationwide.