"The more leakages (S, T, M), the smaller the multiplier."
[ \textYED = \frac%\Delta QD%\Delta Y ] Repack Annotation: YED > 1 = luxury (income elastic). 0 < YED < 1 = necessity. ib economics hl formula booklet repack
[ \textSacrifice Ratio = \frac\textCumulative GDP loss\textReduction in inflation ] Section 3: International Economics – The "Trade & Balance of Payments" Repack International formulas are often the most ignored because students assume they are just definitions. Wrong. HL Paper 3 loves a terms of trade calculation. 3.1 Comparative Advantage (Opportunity Cost) The booklet often just provides output/input tables. The repack provides the decision rule : "Calculate opportunity cost = what you give up / what you gain. The country with the lower opportunity cost has the comparative advantage." "The more leakages (S, T, M), the smaller the multiplier
In this article, we will deconstruct the official booklet, repack it logically by syllabus unit, add memory triggers, and show you exactly how to turn a confusing reference sheet into a high-scoring cheat sheet for your final exams. The official Economics formula booklet (provided for the May and November exam sessions) is sterile. It lists formulas but rarely tells you why you use them or when . The repack provides the decision rule : "Calculate
Good luck, and may the elasticities be ever in your favor.
Do not walk into Paper 3 with a vanilla booklet. Repack it, annotate it, and master it. Your 7 awaits.