Supply and Demand Elasticity

What this video covers

• What price elasticity measures: the sensitivity of quantity demanded or supplied to a change in price
• How to distinguish price elasticity of demand from price elasticity of supply, and which side of the market each examines
• Why inelastic demand means quantity barely changes when price moves (necessities, few substitutes), and elastic demand means quantity moves a lot (luxuries, many substitutes)
• The critical trap that goods with many substitutes are elastic, not inelastic, because buyers switch away when price rises
• Why short-run agricultural supply is inelastic (the crop is already in the ground), and how supply becomes more elastic over longer horizons
• Why inelastic supply or demand causes bigger price swings, not smaller ones, because quantity cannot absorb shocks so price does all the adjusting
• How the exam ties inelasticity directly to high volatility in agricultural and energy commodities