Don't rely on rote memorization. The best method is to practice with past exam papers . Each time you need a formula, refer to your "repack." With repetition, you'll automatically internalize which formula fits which situation. You can also use flashcard apps (like Anki or Quizlet) to drill the formulas.
YED=%ΔQD%ΔYcap Y cap E cap D equals the fraction with numerator % cap delta cap Q cap D and denominator % cap delta cap Y end-fraction
Pay close attention to currency units and the number of decimal places requested (usually two). ib economics hl formula booklet repack
XED=%ΔQd of Good X%ΔP of Good YXED equals the fraction with numerator % cap delta cap Q sub d of Good X and denominator % cap delta cap P of Good Y end-fraction (Positive): Substitutes (e.g., beef and chicken).
This section covers the behavior of individual economic agents—consumers, firms, and markets. It’s heavy on elasticity, costs, revenues, and market structures. Here’s how to repack it. Don't rely on rote memorization
Even the foundational elements of economics require a basic understanding of mathematical relationships, specifically the concept of opportunity cost. Opportunity Cost
Ensure your quantitative analysis matches your sketches of demand and supply shifts. IB Economics HL Formula Booklet | PDF - Scribd You can also use flashcard apps (like Anki
Shifts the supply curve vertically downwards by the subsidy amount ( New Supply Function: Total Government Expenditure: Theory of the Firm (HL Only)
Be prepared to solve simple linear supply and demand equations ( ) to find the market equilibrium where
CPI=Cost of Basket in Specific YearCost of Basket in Base Year×100CPI equals the fraction with numerator Cost of Basket in Specific Year and denominator Cost of Basket in Base Year end-fraction cross 100