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BARRIER TO ENTRY: An institutional, government, technological, or economic restriction on the entry of firms into a market or industry. The four primary barriers to entry are: resource ownership, patents and copyrights, government restrictions, and start-up costs. Barriers to entry are a key reason for market control and the inefficiency that this generates. In particular, monopoly, oligopoly, monopsony, and oligopsony often owe their market control to assorted barriers to entry. By way of contrast, perfect competition, monopolistic competition, and monopsonistic competition have few if any barriers to entry and thus little or no market control.

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RISK POOLING

The process of combining the risks facing individuals into larger groups. This process can be used effectively to transfer individual risks to the entire group. This makes it possible to calculated the risk for the group. Risk pooling is the standard technique that enables the provision of insurance services.

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Today, you are likely to spend a great deal of time searching for rummage sales looking to buy either a set of serrated steak knives, with durable plastic handles or a pair of blue silicon oven mitts. Be on the lookout for the happiest person in the room.
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Junk bonds are so called because they have a better than 50% chance of default, carrying a Standard & Poor's rating of CC or lower.
"How wonderful it is that nobody need wait a single moment before starting to improve the world."

-- Anne Frank

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Weak Axiom of Profit Maximization
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