
REVENUE EFFECT: The goal of imposing taxes to generate revenue used to finance the operation of government, most notably to finance the provision of public goods. This is one of two reasons, and the primary reason, that governments impose taxes. The other reason is the allocation effect. Governments work the revenue effect because they need access to income and resources to build highways, defend the nation, educate the population, and maintain the legal system. They purchase these resources with tax revenue generated through the revenue effect.
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POINT ELASTICITY: The relative responsiveness of a change in one variable (call it B) to an infinitesimally small change in another variable (call it A). The notion of point elasticity typically comes into play when discussing the elasticity at a specific point on a curve. Point elasticity can be calculated in a number of different ways. Sophisticated economists, using sophisticated mathematical techniques (better known as calculus) calculate point elasticity by using derivatives. Derivatives are calculus talk for infinitesimally small changes. The formula for calculating point elasticity using calculus is given as:The symbol that looks like a backward six (∂) is the mathematical notation for a derivative, or infinitesimally small change. The first term on the righthand side of this formula is the percentage change in variable B and the second term is the percentage change in variable A.Unsophisticated folks can also calculate point elasticity without the use of sophisticated calculus. This is done with the midpoint elasticity formula, presented here: midpoint elasticity  =  (B2  B1) (B2 + B1)/2  ÷  (A2  A1) (A2 + A1)/2 
The first term on the righthand side of the equation is the percentage change in variable B. The second term is the percentage change in variable A. The individual items are interpreted as this: A1 is the initial value of A before any changes, A2 is the ending value after A changes, B1 is the initial value of B before any changes, and B2 is the ending value after B changes.This midpoint elasticity formula actually calculates the average or arc elasticity of the entire line segment. However, it also calculates the point elasticity for the midpoint of a line segment.
Recommended Citation:POINT ELASTICITY, AmosWEB Encyclonomic WEB*pedia, http://www.AmosWEB.com, AmosWEB LLC, 20002018. [Accessed: January 18, 2018]. Check Out These Related Terms...       Or For A Little Background...       And For Further Study...      
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