Principles of Microeconomics — Part 3: Elasticity & Consumer Demand

Once you've mastered supply and demand, the next question is: how do quantities respond to price? That's elasticity. You'll compute price elasticity of demand, interpret it as a measure of responsiveness, and see how it drives pricing, tax incidence, and total revenue. Then you'll derive demand itself from consumer choice theory — utility, marginal utility, and the equimarginal principle — which is why a demand curve slopes down in the first place. (Note: Source archive lost videos 4-7 of the Co