📈 Economics · AS 91222 · 2.1

Inflation

External 4 credits CPI Demand-pull Cost-push Effects of inflation Real vs nominal

Every paper: how inflation is measured (CPI), why it happens (demand-pull vs cost-push, with a scenario to identify), and who wins and loses. Calculations: inflation rate from CPI values, and real vs nominal comparisons.

Reference sheet →

Practice

Recall it first, then use it — testing yourself builds the memory, where rereading the notes above only feels easier.

Recall and application shuffled together — you have to work out what each item wants before you can answer it, which is the part the exam actually tests. Both kinds feed the same spacing schedule, so anything you miss comes back sooner.

Say the answer out loud before flipping — that attempt is where the learning happens, even when you get it wrong.

Exam-style only. Instant feedback, shuffled each attempt, best score saved on this device.

What actually comes up

Three questions every year, in a fixed order: the AS/AD model (draw two shifts from two real events, then judge which had the bigger impact), the quantity theory of money (MV = PQ, always tied to a real economic event like a recession), and the effects of inflation (CPI measurement, then who is affected and how). Every "Explain the impact" part explicitly requires you to refer back to your own graph.

Across 3 years

9 questions · 41 parts 17 Achieved 15 Merit 9 Excellence

The pattern — what to prepare

TopicAppears inGrade levelWhat to practise
The AS/AD model — two real events, each graphed as an AD or AS shift, then compared for scale of impact 3/3 years, always Question One A–E "The AS/AD model" — the section this checklist added, since AS/AD graphing was previously untaught here despite appearing every year.
The quantity theory of money (MV = PQ), always tied to a real event (falling interest rates, a recession, a money-supply change) 3/3 years, always Question Two A–E "Quantity theory of money" — state the equation, then compare the RATE of change in the two variables that matter, not just their direction.
A "compare and contrast" or "discuss which had the bigger impact" task as the Excellence part of every question 3/3 years, all three questions, every year E Never just restate which is bigger — give a reason grounded in scale, permanence, or how directly the shock feeds into the whole economy.
The effects of inflation always compare at least two groups (low vs high income, savers vs borrowers, importers vs exporters) 3/3 years, always Question Three A–E "Effects: winners and losers" — the fixed-money-amount test decides who loses; always name BOTH groups, not just one.
One reason government revenue can RISE during high inflation (GST scaling with prices, or bracket creep) 2025 confirmed A–M "Why government revenue can RISE during high inflation" — a genuine mechanism, not a claim that inflation is overall beneficial.
Calculating and comparing real wage change (nominal growth minus inflation) for two different groups 2023 confirmed, and recurring on the wider question index M–E "Calculating and comparing real wage changes" — compare REAL changes, not nominal percentages, to find who was actually better off.
A compare-and-contrast between low- and high-income households, tied to their DIFFERENT spending patterns 3/3 years, always Question Three's Excellence part E "Comparing groups affected by inflation" — the same headline rate can hit groups by different amounts, given their spending pattern.
A disinflation-vs-deflation distinction, always explained using the actual given inflation figures, not just the definitions in the abstract 3/3 years A "Reading the notation" — quote the actual percentage figures from the resource when distinguishing disinflation from deflation.
2025 Job losses and falling petrol prices 14 parts

The 2025 paper ↗ Marking schedule ↗

Question One — Causes of inflation

2024 saw large-scale job losses in New Zealand, hitting cafes and restaurants; separately, petrol prices fell, including the removal of Auckland's regional fuel tax.

  • a On Graph One, show the impact of job losses on aggregate demand, fully labelled. Achieved
  • b Explain the impact of job losses on the price level, referring to Graph One. Merit
  • c On Graph Two, show the impact of decreasing petrol prices on aggregate supply, fully labelled. Achieved
  • d Explain the impact of decreasing petrol prices on the price level, referring to Graph Two. Merit
  • e Explain whether job losses or decreasing petrol prices will have the bigger effect on the price level, referring to both graphs. Excellence

Question Two — Inflation and the quantity theory of money

NZ inflation slowed from a high rate; the Reserve Bank has been decreasing the Official Cash Rate and interest rates.

  • MV = PQ
  • a Explain the difference between disinflation and deflation, using the given inflation figures. Achieved
  • b Explain one reason why the change in inflation rate from 2022 to 2024 is positive for the NZ economy. Achieved
  • c Explain why decreasing interest rates may increase the velocity of circulation. Merit
  • d Using the quantity theory of money, explain how an increasing velocity of circulation will impact inflation — both when other variables stay constant, and when real GDP also increases. Excellence

Question Three — The CPI and its effects on inflation

General questions on how the CPI works and who is affected by inflation.

  • a What does CPI stand for? Achieved
  • b Explain how the CPI is used to calculate the rate of inflation. Achieved
  • c Explain why the rate of inflation, as calculated by the CPI, does not affect all households equally. Merit
  • d Explain one reason why government revenue might increase during a time of high inflation. Merit
  • e Compare and contrast the impact of high inflation on low-income and high-income households. Excellence
2024 Fieldays, Cyclone Gabrielle, and a business-cycle recession 14 parts

The 2024 paper ↗ Marking schedule ↗

Question One — Causes of inflation

The Fieldays event was held in the Waikato region; separately, Cyclone Gabrielle raised production and insurance costs for NZ businesses.

  • a On Graph One, show the impact of Fieldays on aggregate demand. Achieved
  • b Explain the impact of Fieldays on inflation, referring to Graph One. Merit
  • c On Graph Two, show the impact of Cyclone Gabrielle and higher production/insurance costs on aggregate supply. Achieved
  • d Explain the impact of Cyclone Gabrielle and higher costs on inflation, referring to Graph Two. Merit
  • e Discuss whether Fieldays or Cyclone Gabrielle is likely to have had the more significant impact on NZ's inflation rate. Excellence

Question Two — Quantity theory of money and a recession

Experts suggest NZ could experience a recession over the next two years, with a significant decrease in output predicted.

  • MV = PQ
  • a Mark with an X the point on the business-cycle model that best represents a recession. Achieved
  • b State the components of the quantity theory of money (M, V, P, Q). Achieved
  • c Explain why the velocity of circulation is likely to decrease during a recession. Merit
  • d Assuming other variables stay constant, use the quantity theory of money to explain how a decrease in velocity of circulation impacts inflation. Merit
  • e Use the quantity theory of money and the business cycle to explain how a recession may impact overall inflation, covering both real output and velocity of circulation. Excellence

Question Three — Impacts of inflation

NZ's 2023 annual inflation rate (4.7%) was down from 2022 (7.2%), but higher than the UK (4.0%) and EU (3.1%).

  • a Define inflation. Achieved
  • b Explain whether minimum-wage workers would prefer a lower or higher inflation rate. Achieved
  • c Explain whether savers would prefer a lower or higher inflation rate. Merit
  • d Compare and contrast the impact of NZ's higher inflation rate on NZ importers and exporters to the UK and EU. Excellence
2023 Rising wage costs, cost-of-living payments, and a money-supply cut 13 parts

The 2023 paper ↗ Marking schedule ↗

Question One — The AS/AD model

A shortage of migrant workers and rising minimum wage pushed up wage costs for NZ businesses; separately, cost-of-living payments were made to New Zealanders.

  • a On Graph One, show the impact of increased wage costs on aggregate supply. Achieved
  • b Explain the impact of increased wage costs on inflation, referring to Graph One. Merit
  • c On Graph Two, show the impact of the cost-of-living payments on aggregate demand. Achieved
  • d Explain the impact of the cost-of-living payment on inflation, referring to Graph Two. Merit
  • e Discuss whether increasing wage costs or the cost-of-living payment is likely to have had the larger impact on NZ's inflation rate. Excellence

Question Two — Quantity theory of money

NZ's inflation rate was 7.2% (Dec 2022), considered high; the Reserve Bank could reduce the money supply, which was at a record high post-COVID.

  • MV = PQ
  • a Explain one reason why a high inflation rate would negatively impact the NZ economy. Achieved
  • b Identify the variables in the quantity theory of money (M, V, P, Q). Achieved
  • c Use the quantity theory of money to explain how a 2% decrease in money supply would impact inflation, other variables constant. Merit
  • d Compare and contrast the inflation impact of a 2% money-supply decrease when other variables are constant, versus during a recession when output has fallen 3%. Excellence

Question Three — Measurement and impacts of inflation

General questions on CPI measurement and household impacts, with resource material on minimum-wage real wage changes.

  • a Explain how inflation is measured in New Zealand. Achieved
  • b Explain why New Zealand is likely to experience disinflation, rather than deflation, as the Reserve Bank acts to control inflation. Merit
  • c Using the resource material, explain the change in real wages for minimum-wage workers compared to other workers. Merit
  • d Compare and contrast the impact of high inflation on low-income and high-income households. Excellence

Grades above are read from each year's own Achievement/Merit/Excellence evidence statement, condensed to the actual task — the schedules also grade holistically per question on a 0–8 scale, not a fixed mark per bullet.

Past exams & resources

Past exams & marking schedules, AS 91222 (last 5 years)
YearExam paperMarking schedulePractice
2025 Exam paper Marking schedule
2024 Exam paper Marking schedule
2023 Exam paper Marking schedule
2022 Exam paper Marking schedule
2021 Exam paper Marking schedule

⏱ Timed opens the paper and starts a countdown matching the exam length. Official NZQA PDFs. If a link 404s, that year’s paper may sit under a slightly different code: browse the NZQA subject page.

NZQA 91222 exams & schedules CPI calculation + cause identification every year