NCEA Level 2 Economics: Analysing with Economic Concepts and Models
What the standards test
Level 2 Economics rewards analysis, not description. Every answer needs three moves: name the change and the determinant behind it, show the effect on a model (shift, new equilibrium, changed price level or output), then explain the consequence for groups such as households, firms, exporters or the government. Merit answers link the model to a clear explanation; Excellence answers integrate - reasons for the size of the change, short-run versus long-run effects, and an evaluation of extent.
Core models to draw precisely
- Demand and supply: shift only for non-price determinants (income, tastes, price of substitutes/complements, input costs, technology, taxes and subsidies, number of suppliers). A price change by itself causes movement along the curve.
- Circular flow: injections (I, G, X) and withdrawals (S, T, M); flow equilibrium when injections equal withdrawals.
- AD/AS: AD shifts with C + I + G + (X – M); AS shifts with input costs, productivity and supply shocks.
- Indicators: inflation = percentage change in the CPI; unemployment rate = unemployed ÷ labour force; growth = percentage change in real GDP.
Worked example
A major trading partner enters a recession.
- Partner incomes fall, so overseas demand for our exports falls.
- (X – M) falls, so AD shifts left; real output and the price level fall, creating a deflationary gap and rising unemployment as firms need fewer workers.
- Exporters lose revenue, households receive less income, and government tax revenue falls while benefit spending rises.
- Extent depends on how much trade goes to that partner, and whether a depreciation of the exchange rate restores competitiveness.
Traps that cost marks
- Describing ("demand fell") instead of analysing (which determinant, which curve, why).
- Diagrams with no axis labels, no title, or shifts not marked with arrows.
- Treating a price change as a shift of the curve.
- Using nominal GDP when discussing economic growth.
- Calling a one-off price rise "inflation".