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ASSUMPTION: An initial condition or statement that sets the stage for an analysis by abstracting from the real world. Assumptions are important to economic theories and economic analysis. Some assumptions are used to simplify a complex analysis into more easily manageable parts. These establish idealistic benchmarks that can be used to evaluate real world conditions. Other assumptions are used as control conditions that are subsequently changed to evaluate the effect of the change. The use of ceteris paribus assumptions in comparative statics analysis is an excellent example.
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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.
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PURPLE SMARPHIN
[What's This?]
Today, you are likely to spend a great deal of time visiting every yard sale in a 30-mile radius seeking to buy either a coffee cup commemorating next Thursday or a replacement remote control for your stereo system. Be on the lookout for the happiest person in the room.
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The average bank teller loses about $250 every year.
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"A professional is a man who can do his best at a time when he doesnžt particularly feel like it. " -- Alistair Cooke, broadcaster
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VAR
Vector Autoregression
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