1. **Problem Statement:** Define consumer surplus and producer surplus, explain the effect of a binding price floor on market surplus, and discuss deadweight loss and why it occurs. 2. **Definitions:** - Consumer Surplus (CS) is the difference between what consumers are willing to pay and what they actually pay. It is the area below the demand curve and above the market price. - Producer Surplus (PS) is the difference between the market price and the minimum price producers are willing to accept. It is the area above the supply curve and below the market price. 3. **Effect of a Binding Price Floor:** A binding price floor is set above the equilibrium price, causing the price to be artificially high. - At price floor $P_l$, quantity supplied $Q_s$ is greater than quantity demanded $Q_d$. - This creates a surplus of goods (excess supply). - Consumer surplus decreases because consumers pay a higher price and buy less. - Producer surplus may increase for some producers but overall market surplus decreases due to inefficiency. 4. **Deadweight Loss (DWL):** - DWL is the loss of total surplus that occurs because the quantity traded is less than the equilibrium quantity. - It is represented by the triangle between $Q_d$ and $Q_s$ bounded by the demand and supply curves. - DWL occurs because mutually beneficial trades between $Q_d$ and $Q_s$ do not happen due to the price floor. 5. **Summary:** - Consumer surplus and producer surplus measure welfare. - A binding price floor reduces total surplus and creates deadweight loss. - DWL represents lost gains from trade due to market distortions.