Google
Friday 
December 6, 2024 

AmosWEB means Economics with a Touch of Whimsy!

AmosWEBWEB*pediaGLOSS*aramaECON*worldCLASS*portalQUIZ*tasticPED GuideXtra CrediteTutorA*PLS
AGGREGATE EXPENDITURES: The total expenditures on gross domestic product undertaken in a given time period by the four sectors -- household, business, government, and foreign. Expenditures made by each of these sectors are specifically labeled consumption expenditures, investment expenditures, government purchases, and net exports. Aggregate expenditures (AE) are a cornerstone in the study of macroeconomics, playing critical roles in Keynesian economics, aggregate market analysis, and to a lesser degree, monetarism.

Visit the GLOSS*arama


PARADOX OF THRIFT:

The notion that an increase in saving, which is generally good advice for an individual during bad economic times, can actually worsen the macroeconomy causing a reduction in aggregate income, production, and paradoxically a decrease in saving. The paradox of thrift is an example of the fallacy of composition stating that what is true for the part is not necessarily true for the whole.
The paradox of thrift is an analysis of Keynesian economics that illustrates fundamental differences between macroeconomics and microeconomics. The paradox is that an increase in saving, which is a recommended microeconomic strategy when individuals encounter problems, is not the best macroeconomic course of action for the aggregate economy.

An increase in saving by the household sector necessarily goes hand-in-hand with a simultaneous decrease in consumption expenditures, and thus a decrease in aggregate expenditures. This decrease in aggregate expenditures then triggers the multiplier process and subsequently leads to a decrease in aggregate production. To the extent that saving and investment are both induce by changes in aggregate production and income, the saving is likely to paradoxically decrease below the level that existed before the initial change.

The Fallacy of Composition

First consider the fallacy of composition. This is the logical fallacy of arguing that what is true for the parts is also true for the whole. In the study of economics, this takes the form of assuming that what works for parts of the economy, such as households or businesses, also works for the aggregate, or macroeconomy.

This fallacy is most important for complex systems, such as the macroeconomy or the human body, that is composed of numerous different parts. The human body contains different organs, different types of cells, different components, all of which function separately and work together in the operation of the entire body. In a like fashion, the macroeconomy contains different markets, industries, buyers, sellers, consumers, and producers. These components are function separately but come together in the operation of the aggregate economy.

The paradox of thrift is one of the better know examples of the fallacy of composition found in the study of macroeconomics. It demonstrates that what might be true for the part (more saving is better for an individual) is not necessarily true for the whole (more saving can be worse for the economy).

The Injections-Leakages Model

The S-I Model
The S-I Model

The paradox of thrift is best illustrated using the injections-leakages model. The exhibit to the right presents the simplest injections-leakages model that contains a single injection, investment, and a single leakage, saving. This simple saving-investment model, as such, contains a positively-sloped saving line, S, and a horizontal investment line, I. The intersection of these lines is the equilibrium, with aggregate production of $12 trillion.

Saving More

Now suppose that members of the household sector are concerned that a recession is forthcoming. Anticipating that their future incomes might decline, they are motivated to be a bit on the thrifty side. As such, they curtail current expenditure plans and devote more income to saving to protect against future problems. This is certainly sound advice for any individual.

In total, the household sector increases saving by $1 trillion. Because this extra saving is NOT the result of a change in income it is an autonomous change. The increase in saving thus shifts the saving line upward. Click the [Increase Saving] button to illustrate.

The result of this increase in saving is a new equilibrium. The new saving line intersects original investment line at $8 trillion of aggregate production. This new equilibrium is $4 trillion less than the original equilibrium. Concerns by the household sector of an upcoming recession, the act saving more to protect against an economic downturn, has in fact caused a downturn.

What happened?

The $1 trillion increase in saving necessitates a $1 trillion decrease in consumption. This is an autonomous decrease in consumption and like other autonomous expenditure changes, triggers the multiplier process that causes the $4 trillion decline in aggregate production. More saving means less production.

Induced Investment

While causing a recession by protecting against one is perplexing, the real paradox of thrift results from a slight modification of the saving-investment model. The change is to include induced investment expenditures.

The Paradox
The Paradox

The exhibit to the direct right illustrates an updated version of the saving-investment model that includes induced investment. The investment line, I, in this exhibit is positively-sloped. An increase in aggregate production induces an increase in investment expenditures. Or more to the point, a decrease in aggregate production induces a decrease in investment expenditures.

To illustrate how this change creates a paradoxically result, click the [Increase Saving] in this exhibit. The $1 trillion vertical shift of this saving line is identical to the earlier exhibit. The result, however, is slightly different.

The new equilibrium is achieved at the intersection of the new saving line and the original investment line. However, in this case equilibrium level of aggregate production is $6 trillion rather than $8 trillion. But that's not the paradox.

The paradox arises because the equilibrium level of saving is LESS. Prior to the autonomous increase in saving, saving and investment were equal at $2 trillion. However, because investment is induced, the decrease in aggregate production causes a decrease in investment and thus the NEW equilibrium equality between investment and saving is $1.5 trillion, less than the original $2 trillion level.

The paradox of thrift is that the act of increasing saving by individual members of the household sector ends up causing a decrease in saving for the entire household sector.

<= PAPER ECONOMYPART-TIME WORKERS =>


Recommended Citation:

PARADOX OF THRIFT, AmosWEB Encyclonomic WEB*pedia, http://www.AmosWEB.com, AmosWEB LLC, 2000-2024. [Accessed: December 6, 2024].


Check Out These Related Terms...

     | injections | leakages | injections line | leakages line | injections-leakages model | saving-investment model | two-sector injections-leakages model | three-sector injections-leakages model | four-sector injections-leakages model | Keynesian model | multiplier, injections-leakages model |


Or For A Little Background...

     | saving | investment expenditures | fallacy of composition | consumption expenditures determinants |


And For Further Study...

     | multiplier | multiplier principle | fiscal policy | automatic stabilizers |


Related Websites (Will Open in New Window)...

     | The General Theory of Employment, Interest, and Money |


Search Again?

Back to the WEB*pedia


APLS

RED AGGRESSERINE
[What's This?]

Today, you are likely to spend a great deal of time flipping through the yellow pages looking to buy either a handcrafted bird feeder or a New York Yankees baseball cap. Be on the lookout for telephone calls from long-lost relatives.
Your Complete Scope

This isn't me! What am I?

Natural gas has no odor. The smell is added artificially so that leaks can be detected.
"Use, do not abuse; neither abstinence nor excess ever renders man happy."

-- Voltaire, philosopher

WLS
Weighted Least Squares
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