
AGGREGATE EXPENDITURE LINE: A line representing the relation between aggregate expenditures and gross domestic product used in the Keynesian cross. The aggregate expenditure line is obtained by adding investment expenditures, government purchases, and net exports to the consumption line. As such, the slope of the aggregate expenditure line is largely based on the slope of the consumption line (which is the marginal propensity to consume), with adjustments coming from the marginal propensity to invest, the marginal propensity for government purchases, and the marginal propensity to import. The intersection of the aggregate expenditures line and the 45degree line identifies the equilibrium level of output in the Keynesian cross.
Visit the GLOSS*arama




TOTALMARGINAL RELATION: A mathematical connection between a marginal value and the corresponding total value stating that the marginal IS the slope of the total curve. This mathematical relation between total and marginal surfaces throughout the study of economics, especially utility (total utility and marginal utility), production (total product and marginal product), cost (total cost and marginal cost), and revenue (total revenue and marginal revenue). A related mathematical relation exists between a marginal value and the corresponding average value. The mathematical relation between total and marginal means that the slope of a total curve is the marginal value. If the total curve has a positive slope (that is, is upward sloping), then the marginal is positive. If the total curve has a negative slope (downward sloping), then the marginal is negative. If the total curve has a zero slope (horizontal), then marginal is zero. Moreover, if the total curve has an increasing slope (becoming steeper), then the marginal is rising. If the total curve has a decreasing slope (becoming flatter), then the marginal is falling.To see the connection between a marginal and the slope of a given total, consider this general formula for calculating a marginal from a total: marginal  =  change in total change in quantity 
Now consider the general forum for calculating the slope of a total curve. slope  =  rise run  =  change in total change in quantity 
Is this an illusion, or are these two formulas the same? A quick check with an optometrist and psychiatrist suggests a firm grip on reality. The only possible conclusion is that these two formulas are, in fact, the same. And this means that the slope of a total is, in fact, the corresponding marginal. To put this another way, the term "marginal" is really just another way of saying "slope." The two are really one and the same. The only conceivable difference is that slope is used when an actual graph is under discussion, whereas marginal is used when attention is turned to a mathematical equation. But, the underlying concept is the same, whether it is presented in the form of a graph or a mathematical equationmarginal is slope. This totalmarginal relation surfaces throughout the study of economics. Four of the more important totalmarginal relations encountered are total utility and marginal utility, total product and marginal product, total cost and marginal cost, and total revenue and marginal revenue.
Recommended Citation:TOTALMARGINAL RELATION, AmosWEB Encyclonomic WEB*pedia, http://www.AmosWEB.com, AmosWEB LLC, 20002018. [Accessed: June 17, 2018]. Check Out These Related Terms...          Or For A Little Background...     And For Further Study...             
Search Again?
Back to the WEB*pedia



PINK FADFLY [What's This?]
Today, you are likely to spend a great deal of time wandering around the downtown area looking to buy either a rechargeable battery for your computer or shoe laces for your snow boots. Be on the lookout for high interest rates. Your Complete Scope
This isn't me! What am I?


Before 1933, the U.S. dime was legal as payment only in transactions of $10 or less.


"The secret of getting ahead is getting started. The secret of getting started is breaking your complex, overwhelming tasks into small manageable tasks, and then starting on the first one. "  Mark Twain, writer


ANN REPT Annual Report


Tell us what you think about AmosWEB. Like what you see? Have suggestions for improvements? Let us know. Click the User Feedback link.
User Feedback

