Google
Sunday 
March 3, 2024 

AmosWEB means Economics with a Touch of Whimsy!

AmosWEBWEB*pediaGLOSS*aramaECON*worldCLASS*portalQUIZ*tasticPED GuideXtra CrediteTutorA*PLS
AGGREGATE DEMAND: The total (or aggregate) real expenditures on final goods and services produced in the domestic economy that buyers would willing and able to make at different price levels, during a given time period (usually a year). Aggregate demand (AD) is one half of the aggregate market analysis; the other half is aggregate supply. Aggregate demand, relates the economy's price level, measured by the GDP price deflator, and aggregate expenditures on domestic production, measured by real gross domestic product. The aggregate expenditures are consumption, investment, government purchases, and net exports made by the four macroeconomic sectors (household, business, government, and foreign).

Visit the GLOSS*arama


INVESTMENT LINE:

A graphical depiction of the relation between investment expenditures by the business sector and the economy's aggregate level of income or production. This relation plays a key role in the study of Keynesian economics. A investment line is characterized by vertical intercept, which indicates autonomous investment, and slope, which is the marginal propensity to invest and indicates induced investment. The aggregate expenditures line used in Keynesian economics is derived by adding or stacking the investment line onto the consumption line, then adding government purchases and net exports to this stack.
The investment line, also termed propensity-to-invest line, shows the relation between investment expenditures by the business sector and aggregate income or production. The income and production measures most commonly used are national income and gross domestic product. The purpose of the investment line is to graphically illustrate the investment-income relation for the business sector, which is then integrated into the aggregate expenditures line used in Keynesian economics.

The investment line is commonly presented in one of two forms reflecting autonomous investment and induced investment. The simplest is a horizontal investment line, one with a zero slope, that illustrates autonomous investment. With a horizontal line, investment expenditures are constant for all levels of aggregate income or production, hence autonomous and unaffected by income. A more realistic investment line is positively sloped, indicating a degree of induced investment. In this case, the vertical intercept, or Y-intercept, of the investment line marks autonomous investment and the slope represents induced investment. Of no small importance, the slope of the investment line is also the marginal propensity to invest (MPI).

Investment Line
Investment Line

The horizontal red line, labeled I in the exhibit to the right, indicates investment that is completely autonomous. There is no induced investment indicated by this line. The slope of the investment line is zero (MPI = 0). The intercept of this horizontal line indicates autonomous investment, which is $2 trillion in this case.

An alternative investment line, one with induced investment, can be illustrated in the exhibit with a simple click of the [An Induced Line] button. The new red line, labeled I' in the exhibit, is positively sloped, indicating that a change in the level of income or production induces a change in investment expenditures.

This new investment line actually indicates both induced investment and autonomous investment. The slope is induced investment and the intercept is autonomous investment.

  • Slope: The slope of this new investment line is positive, but less than one. In this case the slope is equal to 0.10, a $1 change in aggregate income or production induces a $0.10 change in investment expenditures. This positive slope indicates induced investment. Moreover, the slope of the line is also the marginal propensity to invest (MPI).

  • Intercept: This new investment line, like the original line, intersects the vertical axis at a positive value of $2 trillion. And once again this indicates autonomous investment.

<= INVESTMENT EXPENDITURES DETERMINANTSINVESTMENT, PRODUCTION POSSIBILITIES =>


Recommended Citation:

INVESTMENT LINE, AmosWEB Encyclonomic WEB*pedia, http://www.AmosWEB.com, AmosWEB LLC, 2000-2024. [Accessed: March 3, 2024].


Check Out These Related Terms...

     | induced investment | autonomous investment | marginal propensity to invest | slope, investment line | intercept, investment line | consumption line | saving line | government purchases line | net exports line |


Or For A Little Background...

     | investment | investment expenditures | Keynesian economics | macroeconomics | business sector | national income | gross domestic product |


And For Further Study...

     | induced expenditures | autonomous expenditures | aggregate expenditures | aggregate expenditures line | derivation, consumption line | investment expenditures determinants | Keynesian model | Keynesian equilibrium | injections-leakages model | aggregate demand | paradox of thrift | fiscal policy | multiplier | investment, production possibilities | investment business cycles |


Search Again?

Back to the WEB*pedia


APLS

YELLOW CHIPPEROON
[What's This?]

Today, you are likely to spend a great deal of time wandering around the shopping mall hoping to buy either a wall poster commemorating the 2000 Olympics or a flower arrangement with a lot of roses for your grandmother. Be on the lookout for pencil sharpeners with an attitude.
Your Complete Scope

This isn't me! What am I?

It's estimated that the U.S. economy has about $20 million of counterfeit currency in circulation, less than 0.001 perecent of the total legal currency.
"I think luck is the sense to recognize an opportunity and the ability to take advantage of it . The man who can smile at his breaks and grabs his chance gets on."

-- Samuel Goldwyn, Film executive

DCE
Domestic Credit Expansion
A PEDestrian's Guide
Xtra Credit
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



| AmosWEB | WEB*pedia | GLOSS*arama | ECON*world | CLASS*portal | QUIZ*tastic | PED Guide | Xtra Credit | eTutor | A*PLS |
| About Us | Terms of Use | Privacy Statement |

Thanks for visiting AmosWEB
Copyright ©2000-2024 AmosWEB*LLC
Send comments or questions to: WebMaster