Booklet Repack — Ib Economics Hl Formula
The official booklet scatters the expenditure approach (GDP = C+I+G+(X-M)), the multiplier, and the Phillips curve. A repack forces them onto a single spread.
[ PED = \frac%\Delta QD%\Delta P ]
Trap: Always draw the diagram mentally – who gets the subsidy incidence?
Here are three HL Paper 3 style questions. Use your repack to solve them within 3 minutes each. ib economics hl formula booklet repack
Macro formulas are the most dangerous because they are easy to confuse. Your repack must separate the Keynesian from the Monetarist formulas.
Advanced HL Addition: In your repack, add a specific line for the Equilibrium level of income (Y) involving the 45-degree line: Y = C + I + G + (X – M). Then expand C to a + bYd (where a = autonomous consumption, b = MPC, Yd = disposable income).
The official booklet gives you these formulas raw. Your repack needs to group them by problem type. The official booklet scatters the expenditure approach (GDP
| Concept | Official Formula | Repack Strategy (The "Cheat Code") | | :--- | :--- | :--- | | PED | (%ΔQd)/(%ΔP) | Remember: Always report absolute value (drop -). | | YED | (%ΔQd)/(%ΔY) | Sign matters: + = Normal good; - = Inferior. | | XED | (%ΔQd Good A)/(%ΔP Good B) | + = Substitutes; - = Complements. | | PES | (%ΔQs)/(%ΔP) | Flows from zero to infinity. | | Tax Revenue | Tax per unit × Quantity after tax | Draw the wedge. Area of rectangle under DWL. | | Consumer Surplus (CS) | ½ × Base × Height (demand curve to price) | After tax, CS shrinks to the triangle left of Qty new. | | Producer Surplus (PS) | ½ × Base × Height (price to supply curve) | After tax, PS shrinks. | | DWL (Tax) | ½ × (Tax per unit) × (ΔQuantity) | The deadweight loss triangle. | | Price Ceiling Shortage | Qty demanded – Qty supplied (at ceiling price) | Calculate using the linear functions. |
Pro Repack Tip: Next to the CS formula, draw a tiny right-angled triangle. Visual learners recall shapes faster than text.
A "Repack" is not a new official document. It is a study strategy where the raw formulas are reorganized, contextualized, and annotated for practical use. Think of it as translating the language of mathematics into the language of exam technique. Instead of a list of symbols, a repack organizes formulas by concept, provides memory aids, and highlights common pitfalls. Here are three HL Paper 3 style questions
Below is the definitive "Repack" of the IB Economics HL quantitative syllabus.
In the context of IB Economics, a "Repack" does not refer to an official IB publication. Rather, it is a student-created or educator-designed study resource. It involves taking the raw, official formula booklet provided by the IB and restructuring it for practical application.
The official booklet is organized by broad syllabus sections (Microeconomics, Macroeconomics, etc.). A "Repack" reorganizes this data based on exam utility, pairing formulas with their definitions, units of measurement, and specific "trigger words" found in exam questions.
