Google
Thursday 
December 2, 2021 

AmosWEB means Economics with a Touch of Whimsy!

AmosWEBWEB*pediaGLOSS*aramaECON*worldCLASS*portalQUIZ*tasticPED GuideXtra CrediteTutorA*PLS
DUMPING: Selling the same good to a foreign country at a lower price, often below production cost, than that charged to the domestic buyers. Dumping usually occurs because -- (1) producers in one country are trying to stay competitive with producers in another country, (2) producers in one country are trying to eliminate the producers in another country and gain a larger share of the world market, (3) producers are trying to get rid of excess stuff that they can't sell in their own country, (4) producers can make more profit by dividing sales into domestic and foreign markets, then charging each market whatever price the buyers are willing to pay.

Visit the GLOSS*arama


ARC ELASTICITY:

The average elasticity for discrete changes in two variables. The distinguishing characteristic of arc elasticity is that percentage changes are calculated based on the average of initial and ending values of each variable, rather than initial values. Arc elasticity is generally calculated using the midpoint elasticity formula. The contrast to arc elasticity is point elasticity. For infinitesimally small changes in two variables, arc elasticity is the same as point elasticity.
Arc elasticity is best considered the average elasticity over a range of values for a relation. Like any average, some values within the range are likely to be greater and some less. However, it provides a quick approximation of elasticity when more precise and sophisticated calculation techniques are not possible.

Working Through an Example

A Standard Demand Curve
Demand Curve
The demand curve displayed to the right can be used to illustrate the measurement of arc elasticity using the midpoint elasticity formula. If the price declines from $12 to $8, the quantity demanded increases from 4 to 6, from point X to point Z. Using this midpoint formula (with price designated as P and quantity designated as Q) average price elasticity of demand is:
midpoint
elasticity
=(Q[Z] - Q[X])
(Q[Z] + Q[X])/2
÷(P[Z] - P[X])
(P[Z] + P[X])/2

midpoint
elasticity
=(6 - 4)
(6 + 4)/2
÷(8 - 12)
(8 + 12)/2
=(2)
(5)
÷(-4)
(10)

midpoint
elasticity
=0.4÷-0.4=-1.0

Ignoring the minus sign, the price elasticity of demand over this segment of the demand curve from X to Z is 1.0.

An Average Value

This value of 1.0 is actually an average for the entire range between points X and Z. Precise estimates of point elasticity shows that the elasticity is 0.67 at point X and 1.5 at point Z. Moreover, the elasticity is different at each point on a straight line demand curve such as this one. The only point in which the elasticity is exactly equal to 1.0 is at point Y, the midpoint between X and Z.

This last observation is worth emphasizing. The midpoint elasticity formula effectively estimates the point elasticity at the very midpoint of the overall segment. This means that the elasticity of any point on a demand curve (point elasticity) can be obtained by calculating the arc elasticity with the midpoint elasticity formula such that the desired point is dead center in the middle, the midpoint of the arc.

<= AMERICAN ECONOMIC ASSOCIATIONASSUMPTION =>


Recommended Citation:

ARC ELASTICITY, AmosWEB Encyclonomic WEB*pedia, http://www.AmosWEB.com, AmosWEB LLC, 2000-2021. [Accessed: December 2, 2021].


Check Out These Related Terms...

     | point elasticity | coefficient of elasticity | midpoint elasticity formula | endpoint elasticity formula | point elasticity |


Or For A Little Background...

     | elasticity | price elasticity of demand | price elasticity of supply | income elasticity of demand | cross elasticity of demand |


And For Further Study...

     | elasticity and demand slope | elasticity and supply intercept | demand elasticity and total expenditure | elasticity alternatives | elasticity determinants |


Search Again?

Back to the WEB*pedia


APLS

BROWN PRAGMATOX
[What's This?]

Today, you are likely to spend a great deal of time waiting for visits from door-to-door solicitors looking to buy either a dozen high trajectory optic orange golf balls or a large red and white striped beach towel. Be on the lookout for neighborhood pets, especially belligerent parrots.
Your Complete Scope

This isn't me! What am I?

The average bank teller loses about $250 every year.
"A ship ought not to be held by one anchor, nor life by a single hope. "

-- Epictetus, philosopher

M2
M1 plus savings types of near monies, including savings deposits, certificates of deposits, money market deposits, repurchase agreements, and Eurodollars
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 ©2000-2021 AmosWEB*LLC
Send comments or questions to: WebMaster