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← Economics notes
Edexcel IAL·Economics·IAL Economics

Data Skills & Evaluation

10 min read

Interpreting economic data, index numbers, and how to evaluate arguments and build chains of reasoning.

Top marks in Economics come from applying theory to context and evaluating — not just describing.

Working with data

  • Index numbers: a base year = 100; a value of 115 means a 15% rise since the base.
  • Percentage change =changeoriginal×100= \frac{\text{change}}{\text{original}}\times100=originalchange​×100.
  • Distinguish real (inflation-adjusted) from nominal values.
  • Read graphs/tables carefully: quote figures, identify trends and turning points.

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More Economics notes

The Economic Problem

Demand, Supply & Market Equilibrium

Elasticities of Demand & Supply

Markets, Surplus & Costs