Ib Economics Hl Formula Booklet Repack -

| Formula | Where it traps you | |---------|--------------------| | PED | Don’t forget the midpoint formula in HL? (They give standard % change, but be careful if no starting point given) | | GDP deflator vs CPI | Deflator = domestic production only; CPI = consumer goods basket | | Money multiplier | Real-world leakages (cash, excess reserves) reduce it | | Linear demand/supply | Solve correctly for P then Q, then apply tax before recalculating |

You cannot bring a custom document into the exam. You can only bring the official IBO booklet. So how do you "repack" it? Annotation.

Step 1: Print the Official Booklet Download the latest IB Economics HL/SL formula booklet from your MyIB portal or ask your teacher. Print it single-sided.

Step 2: Color-Code by Paper Section

Step 3: Add the "Missing 10%" in the Margins The official booklet does not include:

Step 4: The "If-Then" Flowchart On a blank page at the front of your repack, draw a decision tree:

HL Paper 3 is quantitative. A repack adds a row of "Common Mistakes" next to every formula. ib economics hl formula booklet repack

[ PED = \frac%\Delta QD%\Delta P ]

The official booklet (IBO Document 2024/2025) gives you the raw data:

But it does not tell you:

The official booklet is a reference sheet. The "Repack" is a strategy guide.

Official: [ \textMultiplier (k) = \frac11 - \textMPC ] Repack Expansion: [ k = \frac1\textMPS + \textMPT + \textMPM ] Where MPS = Marginal Propensity to Save; MPT = Marginal Propensity to Tax; MPM = Marginal Propensity to Import.

Memory Device: "The more leakages (S, T, M), the smaller the multiplier." | Formula | Where it traps you |

Application in Repack:
Change in GDP = Initial spending × Multiplier.
Example: Government spends $10M, MPC = 0.8 → k = 5 → Total GDP change = $50M.