2026-W22
Expectations about future prices and AD–SRAS concepts show the clearest gaps
This week’s aggregate quiz data show strong understanding of short-run monetary effects but notable weakness on supply expectations and some AD–SRAS fiscal scenarios.
Published June 7, 2026
Total attempts (week)
234
Active learners
37
Average score
81.6%
Question accuracy
76.0%
Avg time per question
36 s
1. Weekly Overview
Supply expectations and some AD–SRAS fiscal shifts need attention.
Across 234 attempts from 37 learners, overall accuracy is healthy (~76%), but low accuracy clusters around supply responses to expectations and several AD–SRAS fiscal scenarios. Monetary-policy AD responses remain a relative strength.
Student takeaway: Focus short, targeted revision on expectations and supply (Unit 2.2) and AD–SRAS short-run fiscal shifts (Unit 3.6).
2. Key Patterns
Main Insights
Very low accuracy on supply responses driven by firms' price expectations
The clearest weakness is on questions where producers' expectations about future prices affect current supply: one micro question had 0% correct (unit 2.2). This suggests confusion about how expected future price changes shift current supply decisions.
Advice: Review how producers' expectations change current supply (shift of supply curve vs movement along it). Practice short problems where expected future price falls or rises and state the immediate supply effect.
Strong mastery of short-run monetary-policy effects on AD
Students showed near-perfect accuracy on a question about a central bank sharply raising interest rates and its short-run AD effect (unit 3.5), indicating solid grasp of monetary tightening reducing AD in the short run.
Advice: Keep practicing AD–SRAS diagrams for interest-rate changes: show the short-run movement clearly and label the path to lower inflation.
Mixed understanding of fiscal measures in AD–SRAS scenarios
Questions about fiscal responses (cutting investment and raising taxes; large expansionary spending in a Keynesian gap) had middling accuracy (~42–45%), showing inconsistent ability to map fiscal tools to AD shifts in short-run diagrams.
Advice: Practice two-step diagram work: (1) state the policy action and its direct effect on AD components; (2) redraw AD in the AD–SRAS diagram and note short-run output and price changes.
Some calculation and conceptual items take much longer but are often answered correctly
Several items show very long average times (minutes to over an hour) with high correctness—e.g., a consumer surplus calculation was solved correctly but took ~61 minutes on average for the small group who attempted it—suggesting careful, time-consuming work rather than guesswork.
Advice: For timed practice, do a few numerical questions under a realistic time limit to build speed: focus on linear-demand consumer surplus and tax/VAT arithmetic.
3. Revision Plan
Priority Areas
Supply responses to expectations · 2.2
Lowest accuracy (0%) on a direct question about producers' expected future prices changing current supply.
Action: Practice short written explanations and diagrams: work 6–8 short problems where expected future price rises/falls and state supply curve shift.
Cross-price relationships (complements & substitutes) · 2.1
High wrong rates on combined-effects questions about complements and substitutes.
Action: Review cross-price effects and do quick sign-check practice (price up → demand up/down) for pairs of goods.
AD–SRAS short-run fiscal shifts · 3.6
Middling accuracy on fiscal-policy scenarios compared with clear strength on monetary cases.
Action: Redraw AD–SRAS examples: for each fiscal change, write the immediate demand-side effect and redraw the short-run diagram.
Timed quantitative practice (consumer surplus, VAT) · 2.3 / 2.7
Some numerical items show long completion times; speed under exam conditions may be limited for many students.
Action: Do 10 timed calculation questions (10–15 min blocks) on linear demand, consumer/producer surplus and simple tax/VAT arithmetic.
4. Question Evidence
Featured Questions
Most Wrong Questions
| Question | Topic | Unit | Attempts | Correct | Wrong | Avg Time |
|---|---|---|---|---|---|---|
| Smartphones and mobile apps are complements, while smartphones and tablets are substitutes. If app-store prices rise sharply at the same time that tablet prices fall, what is the combined expected effect on smartphone demand? | Microeconomics | 2.1 | 45 | 20.0% | 80.0% | 32.1 s |
| The government faces a large inflationary gap, with actual output above the full-employment level and rising demand-pull inflation. It responds by cutting government investment projects and raising income taxes. In the AD–SRAS framework, which curve shifts in the short run, and in which direction? | Macroeconomics | 3.6 | 40 | 45.0% | 55.0% | 16.4 s |
| In a Keynesian AD–SRAS–LRAS diagram, Ibonomica is operating well below full employment on the relatively flat section of the AS curve. The government implements a large increase in infrastructure and education spending to close the deflationary gap. Which curve shifts first, and in which direction, when focusing on the short-run demand-side impact? | Macroeconomics | 3.6 | 31 | 41.9% | 58.1% | 19.3 s |
| What happens to the demand for tea if the price of coffee, a substitute good, increases? | Microeconomics | 2.1 | 33 | 45.5% | 54.5% | 21.8 s |
| If smartphone makers expect a recession that will lower future phone prices, what is likely to happen to the current supply of smartphones? | Microeconomics | 2.2 | 14 | 0.0% | 100.0% | 11.2 s |
Most Correct Questions
| Question | Topic | Unit | Attempts | Correct | Wrong | Avg Time |
|---|---|---|---|---|---|---|
| How is aggregate demand affected when households become more confident about the future and expect their incomes to rise? | Macroeconomics | 3.2 | 32 | 71.9% | 28.1% | 22.4 s |
| The US Federal Reserve (Fed) sharply raises interest rates to reduce inflation that is well above target. In the AD–SRAS framework, which curve is primarily affected in the short run, and how does it move? | Macroeconomics | 3.5 | 22 | 100.0% | 0.0% | 17.0 s |
| Over many years, the central bank of Ibonomica maintains low and stable interest rates, encouraging persistent increases in private investment in new technologies and capital equipment. In the AD–SRAS–LRAS diagram, which curve is most likely to shift in the long run as a result of this monetary policy, and in which direction? | Macroeconomics | 3.5 | 31 | 71.0% | 29.0% | 49.1 s |
| A new AI-powered logistics system makes it cheaper and faster to deliver online grocery orders; what happens to the supply of online groceries? | Microeconomics | 2.2 | 20 | 90.0% | 10.0% | 9.2 s |
| The government faces a large inflationary gap, with actual output above the full-employment level and rising demand-pull inflation. It responds by cutting government investment projects and raising income taxes. In the AD–SRAS framework, which curve shifts in the short run, and in which direction? | Macroeconomics | 3.6 | 40 | 45.0% | 55.0% | 16.4 s |
Most Time Spent Questions
| Question | Topic | Unit | Attempts | Correct | Wrong | Avg Time |
|---|---|---|---|---|---|---|
| In the market for artisanal coffee, the (linear) inverse demand curve has a price‑axis intercept at $30. The market is in competitive equilibrium at a price of $12 and a quantity of 200 cups per day. Calculate the consumer surplus at this equilibrium. | microeconomics | 2.3 | 5 | 100.0% | 0.0% | 61.4 min |
| What effect does imperfect information have on consumer or producer decisions? | Microeconomics | 2.4 | 3 | 100.0% | 0.0% | 31.7 min |
| In IB Economics, how is fiscal policy defined? | macroeconomics | 3.6 | 4 | 100.0% | 0.0% | 25.3 min |
| The UK applies a 20% VAT on clothing purchases, but no indirect taxes are imposed earlier in the fast fashion production process. If the average person in the UK spends £76.53 per month on clothing, estimate the total VAT paid per person annually on clothing. | microeconomics | 2.7 | 5 | 20.0% | 80.0% | 19.0 min |
| What is a key goal of the circular economy model? | Introduction to Economics | 1.2 | 8 | 62.5% | 37.5% | 16.5 min |
5. Conclusion
Next steps
Prioritise short sessions on supply expectations (Unit 2.2) and targeted AD–SRAS diagram practice for fiscal actions (Unit 3.6). Add timed numerical drills for consumer surplus and VAT to build speed.
Note: This weekly report is automatically generated and may contain mistakes. Always double-check key points before using them for revision.
This report summarizes anonymized, aggregate quiz activity and question-level statistics from the week; no individual student data are shown.