Development formulas are rare but appear in HL Paper 3 as data response questions.
A proper repack isn't just rewriting the formulas in a prettier font. It is a structural overhaul. Here is what the best student-created repacks include:
Download the latest version from your teacher or the IBO website. Use a highlighter and micro pens. ib economics hl formula booklet repack
[ \textReal ER = \textNominal ER \times \fracP_\textdomesticP_\textforeign ]
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. Development formulas are rare but appear in HL
MPC = 0.75, MPT = 0.1, MPM = 0.05. Government increases spending by $40 million. Calculate total increase in GDP.
Repack solution:
Multiplier = 1 / (MPS + MPT + MPM). MPS = 1 – MPC = 0.25.
k = 1 / (0.25 + 0.1 + 0.05) = 1 / 0.4 = 2.5.
ΔGDP = 40M × 2.5 = $100 million. Here is what the best student-created repacks include:
The "Repack" for Macro focuses on the relationship between income, expenditure, and output.