First, a crucial distinction. Unlike Physics or Mathematics HL, the Economics HL formula booklet is a massive, intimidating tome. It is a slim, two-to-three-page document provided by the IBO specifically for the Paper 3 examination .
PES=%ΔQs%ΔPPES equals the fraction with numerator % cap delta cap Q sub s and denominator % cap delta cap P end-fraction
Remember: Paper 3 (Quantitative) is the easiest paper to gain marks on if you master the math. It is the only paper where the answer is objectively right or wrong. Use the formula booklet as your roadmap, and you turn Economics HL from a theoretical marathon into a mathematical sprint. ib economics hl formula booklet
| Concept | Formula | |---------|---------| | PED | (%ΔQd) / (%ΔP) | | YED | (%ΔQd) / (%ΔY) | | XED | (%ΔQd good A) / (%ΔP good B) | | PES | (%ΔQs) / (%ΔP) | | Tax revenue | Tax per unit × Quantity after tax | | Consumer surplus (CS) | ½ × (max price − equilibrium price) × equilibrium Q | | Producer surplus (PS) | ½ × (equilibrium price − min price) × equilibrium Q | | Price floor/ceiling effects | Shortage/Surplus calculations (using linear demand/supply) |
Paper 3 questions often conclude with a policy recommendation or an explanation of your mathematical findings. Use your quantitative answers as empirical evidence to justify your macroeconomic or microeconomic policy advice. Conclusion First, a crucial distinction
. While the IB does not provide a physical formula booklet during exams (unlike Math or Physics), students are expected to know these formulas and use them for calculations and diagram plotting 1. Demand, Supply, and Elasticities
ΔCΔYthe fraction with numerator cap delta cap C and denominator cap delta cap Y end-fraction PES=%ΔQs%ΔPPES equals the fraction with numerator % cap
TRQthe fraction with numerator cap T cap R and denominator cap Q end-fraction :
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