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September 17, 2026 

AmosWEB means Economics with a Touch of Whimsy!

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MARGINAL REVENUE, PERFECT COMPETITION: The change in total revenue resulting from a change in the quantity of output sold. Marginal revenue indicates how much extra revenue a perfectly competitive firm receives for selling an extra unit of output. It is found by dividing the change in total revenue by the change in the quantity of output. Marginal revenue is the slope of the total revenue curve and is one of two revenue concepts derived from total revenue. The other is average revenue. To maximize profit, a perfectly competitive firm equates marginal revenue and marginal cost.

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BROWN PRAGMATOX
Your compete MICRO*scope for today

You are the type of person who often opts not to make a purchase, even though it could be problematic down the road. Family and friends never, never, never ask you for a loan. Today, you are likely to spend a great deal of time strolling around a discount warehouse buying club looking to buy either a large stuffed brown and white teddy bear or a replacement washer for your kitchen faucet. Be on the lookout for spoiled cheese hiding under your bed hatching conspiracies against humanity. You should consider shopping at stores or businesses beginning with the letter Y, but do not buy any products with a serial number or product code containing the number 623682. Your preferred shopping venue is thrift stores. Your special symbol is the comma (,).


Is this You?

As a Brown Pragmatox, you are down-to-earth and practical. You are hard working and industrious. You are frugal to the point that you might even refrain from making a purchase that you really, really need. Doing so often causes problems down the road. You definitely go with function over form and substance over style.


This isn't me! What am I?
MARGINAL PROPENSITY TO INVEST

The change in business investment expenditures induced by a change in income or production (national income or gross domestic product). The marginal propensity to invest (abbreviated MPI) is another term for the slope of the investment line and is calculated as the change in investment divided by the change in income or production. The MPI plays a role in Keynesian economics. It augments the slope of the aggregate expenditures line and is part to the multiplier process. A related marginal measure is the marginal propensity to consume.

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Borrowing Through The FINANCIAL MARKETS

We never know whom we might encounter on our leisurely stroll through the economy. Passing by the marble columns of Interstate OmniBank -- the beacon of safety and security -- we have the good fortune of crossing paths with our Ivy-League-educated pillar of the financial community -- Winston Smythe Kennsington III. Although he seems to be a touch condescending, he's kind enough to show us a freshly signed check for $37 gadzillion, which is but a small part of a multi-gadzillion dollar loan from the Interstate OmniBank. To what constructive purpose Winnie will put these funds remains unclear; how this loan will be repaid, he never says; but Winnie proudly reminds us several times that this loan once again proves his unchallenged standing as the majordomo of the financial markets.
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APLS

The portrait on the quarter is a more accurate likeness of George Washington than that on the dollar bill.
"You need just the right amount of ambition . . . If you have too little ambition, you don't push or work hard. If you have too much ambition, you put yourself ahead of others, elbow them out of your way. "

-- Andy Grove, Intel chairman and co-founder

MPI
Marginal Propensity to Invest
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