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January 18, 2026 

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PHYSICAL SCIENCE: The scientific study of nonhuman, nonsociety phenomenon, such as atoms, planets, wildlife, and continental drift. Common disciplines that study these physical phenomenon go by the names physics, chemistry, biology, geology, and astronomy, among others. The primary reason for this entry is to provide a contrast with social sciences, especially economics, that study human behavior and society.

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SIGNALLING

When confronted by asymmetric information, the use of small bits of information, or indicators, that suggest more comprehensive information. Signalling is used by those with more information to reduce the cost of informing those with less information. It is commonly used in markets with adverse selection. Methods of signalling include advertising, brand names, and warranties. A related method is screening.

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GRAY SKITTERY
[What's This?]

Today, you are likely to spend a great deal of time flipping through the yellow pages looking to buy either a how-to book on surfing the Internet or a computer that can play music and burn CDs. Be on the lookout for slightly overweight pizza delivery guys.
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The first paper currency used in North America was pasteboard playing cards "temporarily" authorized as money by the colonial governor of French Canada, awaiting "real money" from France.
"Twenty years from now you will be more disappointed by the things that you didn't do than by the ones you did do. So throw off the bowlines. Sail away from the safe harbor. Catch the trade winds in your sails. Explore. Dream. Discover."

-- Mark Twain

NAIRU
Non-Accelerating Inflation Rate of Unemployment
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