Microeconomics requires you to calculate how consumers and producers make decisions and how markets reach equilibrium. Market Equilibrium and Functions Where: is quantity at zero price; is the slope (responsiveness to price). Supply Function: Where: is quantity at zero price; is the slope. Equilibrium Condition:
Gini=AA+BGini equals the fraction with numerator cap A and denominator cap A plus cap B end-fraction Where:
Never leave a number naked. Always append the correct notation: currency symbols ($, €, £), percentages (%), or millions/billions specified in the prompt.
In the end, the IB Economics HL Formula Booklet is not a shortcut. It is permission to focus on higher-order thinking. The numbers are given; the insight is yours. Master it, and you transform a cold list of equations into your warmest exam ally.
ΔY=k×Initial Injectioncap delta cap Y equals k cross Initial Injection Unit 4: The Global Economy
The formula booklet provides the formula, but you must know how to input data (e.g., millions vs. billions, percentages).
A favorite trick of IB examiners is giving you the demand function (
PED=%ΔQd%ΔPPED equals the fraction with numerator % cap delta cap Q sub d and denominator % cap delta cap P end-fraction
Interpretation: An increase represents an improvement; a decrease represents a deterioration. Section 4: Essential Mathematical Tools
MPC (Consume)+MPS (Save)+MPT (Tax)+MPM (Import)=1MPC (Consume) plus MPS (Save) plus MPT (Tax) plus MPM (Import) equals 1
The Ultimate Guide to the IB Economics HL Formula Booklet: Master the Math to Ace Your Exams
Amount in Currency B=Amount in Currency A×Exchange Rate of A to BAmount in Currency B equals Amount in Currency A cross Exchange Rate of A to B
Because you cannot rely on an official booklet, you must internalize the formulas. Think of this guide as the blueprint for building your own "mental" (and physical revision) formula booklet—a comprehensive collection of every calculation you need to memorize for the exam. As a core part of your HL studies, you are expected to understand, apply, and manipulate these formulas independently.