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You're familiar with supply and demand curves already. In this tutorial we'll explore what implications their steepness (or lack of) implies. Price elasticity is a measure of how sensitive something is to price.
Introduction to price elasticity of demand
Looking a bit deeper at why elasticity changes despite having a linear demand curve
Extreme examples of price elasticity of demand
What a demand curve with constant unit elasticity would look like
Thinking about how total revenue and elasticity are related
Clarification on the relationship between total revenue and elasticity
Price of one good impacting quantity demanded of another
Thinking about elasticity of supply
Why we calculate percent changes in a strange way when calculating elasticities