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DEMOGRAPHIC VARIABLES: Characteristics of the aggregate population that marketers use to segment the market, including age, ethnicity, income, education, gender, and race. Other characteristics include occupation, family size, religion, and social class. These characteristics are the link to buyers' wants and needs and affect purchasing behavior. By carefully studying population groups marketers develop marketing mixes that maximize customer activity.

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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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Today, you are likely to spend a great deal of time watching infomercials trying to buy either a battery-powered, rechargeable vacuum cleaner or a remote controlled World War I bi-plane. Be on the lookout for malfunctioning pocket calculators.
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The earliest known use of paper currency was about 1270 in China during the rule of Kubla Khan.
"Good plans shape good decisions. That's why good planning helps to make elusive dreams come true."

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