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October 6, 2026 

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ENTRY BARRIER: 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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GOLDSMITH MONEY CREATION

An illustration of the basic money creation process undertaken by banks using the hypothetical activities of a hypothetical goldsmith. The goldsmith profession of Medieval Europe provides insight into the modern banking business, including the seemingly magical ability of banks to create valuable money out of inputs with significantly less value.

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APLS

YELLOW CHIPPEROON
[What's This?]

Today, you are likely to spend a great deal of time flipping through mail order catalogs wanting to buy either a birthday greeting card for your aunt or a wall poster commemorating the moon landing. Be on the lookout for infected paper cuts.
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This isn't me! What am I?

A U.S. dime has 118 groves around its edge, one fewer than a U.S. quarter.
"Advice is like snow ‚ the softer it falls, the longer it dwells upon and the deeper it sinks into the mind. "

-- Samuel Taylor Coleridge, poet

ACT
Advance Corporation Tax
A PEDestrian's Guide
Xtra Credit
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