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.
The question we're answering in this lesson is, 'What causes the production possibilities curve to shift?' Before we answer this, let's review some of the basic ideas about the production possibilities curve, using two types of curves. Let's say we have a production possibilities curve showing the production of two goods: cars and computers. Consumer and Capital Goods Economists also use the PPF model to illustrate two categories of goods, both consumer goods and capital goods.