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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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SIXTH RULE OF IGNORANCE

The sixth of seven basic rules of the economy, stating that obtaining information is a costly activity that requires resources with alternative uses. As such, no one knows everything and everyone is ignorant about something.

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BROWN PRAGMATOX
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Today, you are likely to spend a great deal of time looking for the new strip mall out on the highway wanting to buy either galvanized steel storage shelves or a large green chalkboard shaped like the state of Maine. Be on the lookout for door-to-door salesmen.
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This isn't me! What am I?

Mark Twain said "I wonder how much it would take to buy soap buble if there was only one in the world."
"It is not fair to ask of others what you are unwilling to do yourself. "

-- Eleanor Roosevelt, diplomat, activist

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