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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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LONG RUN, MICROECONOMICS In terms of the microeconomic analysis of production and supply, a period of time in which all inputs under the control of a firm used in the production process are variable. In the long run, labor and capital are variable inputs. The long-run analysis of production reveals the key role played by returns to scale. This is one of four production time periods used in the study of microeconomics. The other three are short run, very long run, and very short run (or market period). The long run is also a time period designation used in the macroeconomic analysis of economic growth and full employment.
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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.
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"If anything terrifies me, I must try to conquer it. " -- Francis Charles Chichester, yachtsman, aviator
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AR(N)
A nth-order Autoregressive Process
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