Forever Stamps are always sold at the same price as a regular First-Class Mail stamp. The Postal Service developed the Forever Stamp for consumers ease of use during price changes. Forever Stamps are available for purchase at post offices nationwide, online at usps.com, and by phone at 1-800-STAMP-24 (1-800-782-6724).
Production Possibility curves. The production possibility curves is a hypothetical representation of the amount of two different goods that can be obtained by shifting resources from the production of one, to the production of the other. The curve is used to describe a societys choice between two different goods. Figure 1, shows the two goods as consumption and investment.
Economics Explained: Production-Possibility Frontier. Whenever a company, factory, or even country decides to produce something, there is only so much they can make. A finite amount of capital (factories, production equipment, etc) and laborers exist, and they limit the possible amount of production. The production-possibility frontier, or PPF, is a graphical way of showing trade-offs in production choices between 2 items. If the United States decided tomorrow to produce as many loaves of bread as possible, there would be a limit to how many loaves were made.