March 20, 2018 

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PPF: The abbreviation for production possibilities frontier, which is a curve that illustrates the production possibilities for the economy. A production possibilities frontier represents the boundary or frontier of the economy's production capabilities. That's why it's termed a production possibilities frontier (or PPF). As a frontier, it is the maximum production possible given existing (fixed) resources and technology. Producing on the curve means resources are fully employed, while producing inside the curve means resources are unemployed. The law of increasing opportunity cost is what gives the curve its distinctive convex shape.

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BUSINESS SECTOR: The basic macroeconomic sector containing the private, profit-seeking firms in the economy that combine scarce resources into the production of wants-and-needs satisfying goods and services. The key economic function of the business sector is the production of goods and services. The three basic types of business organizations that comprise the business sector are proprietorship, partnership, and corporation. This is one of the four macroeconomic sectors. The other three are household sector, government sector, and foreign sector. You might want to check out the key role that the business sector plays in the circular flow.

     See also | macroeconomics | firm | economy | scarce resource | production | goods | services | proprietorship | partnership | corporation | household sector | government sector | foreign sector | circular flow | capital | investment expenditures | gross domestic product | business cycles | economic growth |

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The general demand relation in which relatively small changes in price cause relatively large changes in quantity demanded. Small changes in price cause relatively large changes in quantity demanded or the percentage change in quantity demanded is larger than the percentage change in price. This characterization of elasticity is most important for the price elasticity of demand. Elastic demand is one of two general elasticity relations for demand. The other is inelastic demand.

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