Demand for a product tends to be price inelastic if:
a. the product is considered a luxury item
b. few good complements for the product are available
c. the population in the market area is large
d. people spnd a large share of their income on the product
Trick question, and a great reminder to be careful because this one got me as well. It's ruling out all alternatives:
A: Luxury item (elastic demand)
B: complements have more to do with other products to use with this one. It's not the same as substitutes (that's the catch).
C: Population that is large doesn't influence this (formula uses quantity and income)
D: As what previous comments mentioned above - I agree a large share of income allocated towards a product would result in a greater need for the product. Below are some additional notes:
A. Factors Affecting Demand Elasticity
There are three main factors that influence a demand's price elasticity:
1. The availability of substitutes - This is probably the most important factor influencing the elasticity of a good or service. In general, the more substitutes, the more elastic the demand will be. For example, if the price of a cup of coffee went up by $0.25, consumers could replace their morning caffeine with a cup of tea. This means that coffee is an elastic good because a raise in price will cause a large decrease in demand as consumers start buying more tea instead of coffee.
However, if the price of caffeine were to go up as a whole, we would probably see little change in the consumption of coffee or tea because there are few substitutes for caffeine. Most people are not willing to give up their morning cup of caffeine no matter what the price. We would say, therefore, that caffeine is an inelastic product because of its lack of substitutes. Thus, while a product within an industry is elastic due to the availability of substitutes, the industry itself tends to be inelastic. Usually, unique goods such as diamonds are inelastic because they have few if any substitutes.
2. Amount of income available to spend on the good - This factor affecting demand elasticity refers to the total a person can spend on a particular good or service. Thus, if the price of a can of Coke goes up from $0.50 to $1 and income stays the same, the income that is available to spend on coke, which is $2, is now enough for only two rather than four cans of Coke. In other words, the consumer is forced to reduce his or her demand of Coke. Thus if there is an increase in price and no change in the amount of income available to spend on the good, there will be an elastic reaction in demand; demand will be sensitive to a change in price if there is no change in income.
3. Time - The third influential factor is time. If the price of cigarettes goes up $2 per pack, a smoker with very few available substitutes will most likely continue buying his or her daily cigarettes. This means that tobacco is inelastic because the change in price will not have a significant influence on the quantity demanded. However, if that smoker finds that he or she cannot afford to spend the extra $2 per day and begins to kick the habit over a period of time, the price elasticity of cigarettes for that consumer becomes elastic in the long run.
Read more: http://www.investopedia.com/university/economics/economics4.asp#ixzz1iHvhkxIA
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