The IB Economics Higher Level (HL) course relies heavily on a student's ability to master mathematical calculations, especially for Paper 3, which is almost entirely calculation-based. Unlike other IB subjects, there is no official "data booklet" provided during the exam, meaning all formulas must be memorized.

4.1 Gini Coefficient & Lorenz Curve

The booklet may not explicitly give a formula but expects you to know: [ \textGini Coefficient = \frac\textArea between Lorenz curve and line of equality\textTotal area under line of equality ] Repack Shortcut: Gini = A / (A+B). 0 = perfect equality, 1 = perfect inequality.

This guide breaks down exactly what you need to "repack" into your memory to conquer the HL syllabus. 1. Microeconomics: The Foundations of Firm Behavior

the fraction with numerator % cap delta cap Q sub d cap A end-sub and denominator % cap delta cap P sub cap B end-fraction Costs & Revenue Total Revenue (TR) Marginal Cost (MC)

Repack solution:
TOT = (120 / 110) × 100 = 109.1. Favorable.

For Good A in Country X: Output of Good B / Output of Good A
Lower opportunity cost = Produce Good A.

But in the repack, we add the context: "PED < 1 = inelastic (taxes work here)" or "YED > 1 = luxury (luxury cars)."

$0 < YED < 1$: Necessity.
$YED > 1$: Luxury.

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Ib Economics Hl Formula Booklet Repack [repack]

4.1 Gini Coefficient & Lorenz Curve

This guide breaks down exactly what you need to "repack" into your memory to conquer the HL syllabus. 1. Microeconomics: The Foundations of Firm Behavior The IB Economics Higher Level (HL) course relies

the fraction with numerator % cap delta cap Q sub d cap A end-sub and denominator % cap delta cap P sub cap B end-fraction Costs & Revenue Total Revenue (TR) Marginal Cost (MC) For Good A in Country X: Output of

Repack solution:
TOT = (120 / 110) × 100 = 109.1. Favorable.