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October 12, 2026 

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ACTUAL INVESTMENT: Investment expenditures that the business sector actual undertakes during a given time period, including both planned investment and any unplanned inventory changes. This is a critical component of Keynesian economics and the analysis of macroeconomic equilibrium, which occurs when actual investment is equal to planned investment. The difference between planned and actual investment is unplanned investment, which is inventory changes caused by a difference between aggregate expenditures and aggregate output. Should actual and planned investment differ, then aggregate expenditures are not equal to aggregate output, and the macroeconomy is not in equilibrium.

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SHORT RUN, MICROECONOMICS

In terms of the microeconomic analysis of production and supply, a period of time in which at least one input under the control of a firm used in the production process is variable and at least one input is fixed. In the short run, the variable input is usually labor and the fixed input is capital. The short-run analysis of production reveals the law of diminishing marginal returns and provides an understanding of the upward-sloping supply curve and the law of supply. This is one of four production time periods used in the study of microeconomics. The other three are long run, very long run, and very short run (or market period). The short run is also a time period designation used in the macroeconomic analysis of business cycles.

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"Life is not a 'brief candle.' It is a splendid torch that I want to make burn as brightly as possible before handing it on to future generations. "

-- Bernard Shaw, journalist

A Perfect Picture Of PROFIT

Good news! Manny Mustard, my long-time friend and proprietor of Manny Mustard's House of Sandwiches is having a special on his Deluxe Club Sandwich. Let's drop in for a brief respite -- and lunch. More good news! Manny is bubbling profusely about the vitality of his business. Last month he turned a profit. Yes, that much cherished profit, the goal of business firms, be they large or small. Upon closer inspection Manny's profit calculation might be suffering from an oversight or two. It seems as though Manny neglected to pay himself a wage. Nor did he bother to include any interest expense on the savings he invested in his House of Sandwiches venture. But what the heck, he earned a profit -- didn't he?
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Today, you are likely to spend a great deal of time looking for a downtown retail store wanting to buy either a T-shirt commemorating the first day of spring or a coffee cup commemorating last Friday (you know why). Be on the lookout for jovial bank tellers.
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Mark Twain said "I wonder how much it would take to buy soap buble if there was only one in the world."
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