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April 9, 2026 

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IMPLICIT COST: An opportunity cost that does NOT involve a money payment or a market transaction. This should be contrasted with explicit cost that DOES involve a money payment or a market transaction. The common misconception among non-economists out there in the real world is that the term "cost" is synonymous with the term "payment," that is, all costs are explicit costs, to be a cost you have to give up some money. Well, I'm here to tell you that this isn't true. Cost is opportunity cost. It's the satisfaction NOT received from activities NOT pursued. It's the value of foregone production. And not all opportunity costs involve a money payment.

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INFORMATION

The transfer of knowledge from one person to another. Information is a flow concept. It requires someone (or something) to do the sending and someone to do the receiving. Information is a valuable commodity that provides benefits, but also incurs an opportunity cost to produce, meaning information is never perfect or complete. The existence of asymmetric information (some have more information than others) gives rise to the problems of adverse selection, moral hazard, and the principal-agent problem.

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Today, you are likely to spend a great deal of time at a garage sale wanting to buy either a hepa filter for your furnace or a wall poster commemorating next Thursday. Be on the lookout for florescent light bulbs that hum folk songs from the sixties.
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In the Middle Ages, pepper was used for bartering, and it was often more valuable and stable in value than gold.
"It is not the mountain we conquer, but ourselves. "

-- Sir Edmund Hillary, Explorer

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