Understanding elasticity of Demand

Note: This is the eighth post in a weekly video series on basic microeconomics.
Prices can have an effect on the demand of goods and services. But how much does quantity demanded change when prices changes? By a lot or by a little? Elasticity can help us understand this question. This video covers determinants of elasticity such as availability of substitutes, time horizon, classification of goods, nature of goods (is it a necessity or a luxury?), and the size of the purchase relative to the consumer’s budget.
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