2026-W37
Aggregation of demand and some macro concepts show clear gaps
This week's aggregate quiz activity shows strong mastery of basic micro concepts but repeated errors when deriving market demand and interpreting GDP per capita and cost-push inflation.
Published September 20, 2026
Average score
79.95%
Question accuracy
78.46%
Total attempts this week
94
Average time per question
38.6s
1. Weekly Overview
Micro fundamentals are solid; aggregation and some macro definitions need focused revision.
Learners scored well overall (≈80%) and answered core micro questions (equilibrium, opportunity cost, social surplus) with near-perfect accuracy. However, several medium-difficulty items on deriving market demand and basic macro definitions (GDP per capita, cost-push inflation) had high wrong-rates or 0% correct in multiple attempts. Time-on-question outliers on monetarism and FX diagram questions suggest extra hesitation on some policy and open-economy items.
Student takeaway: Prioritise practice on how to aggregate individual demand into market demand, revisit GDP per capita purpose/limits, and review causes of cost-push inflation.
2. Key Patterns
Main Insights
Difficulty deriving market demand from individual demand
The question on deriving market demand (Micro, Unit 2.1) had a high wrong-rate (62.5%) across 8 attempts, indicating confusion about horizontal aggregation and how individual responses shift with price changes.
Advice: Practice drawing two or three individual demand curves and perform the horizontal summation step-by-step; explain in words how quantity demanded at each price is combined.
Confusion on basic macro definitions (GDP per capita, cost-push inflation)
Two macro items — 'Why is GDP per capita used?' and 'Which scenario would most likely result in cost-push inflation?' — had 0% correct across multiple attempts, signalling conceptual gaps in interpreting macro indicators and inflation drivers.
Advice: Review the purpose, calculation and limits of GDP per capita with short numeric examples and revisit supply-side shocks (e.g., rising input costs) that cause cost-push inflation.
Strong mastery of core micro concepts
Several micro questions (market equilibrium, social/community surplus, opportunity cost) had perfect accuracy across multiple attempts, showing reliable understanding of equilibrium and welfare basics.
Advice: Keep practicing application-style questions that shift supply/demand to ensure this strength transfers to comparative statics and welfare analysis.
Long response times on certain policy and FX items
Some items (monetarism definition, FX diagram question) had unusually high average times per question (≈85–95s), which may indicate careful reasoning or hesitation on policy/diagram interpretation.
Advice: When revising policy schools or FX diagrams, practise timed explanations and sketch diagrams under time constraints to increase fluency.
3. Revision Plan
Priority Areas
Deriving market demand (aggregation) · 2.1
Highest-volume wrong responses on aggregation mechanics and combining individual demand schedules.
Action: Do 6–8 practice questions: draw individual demand curves and perform horizontal summation; write a one-sentence explanation for each step.
GDP per capita — purpose and limits · 3.1
0% correct on a direct question about why GDP per capita is used.
Action: Work through 2 numeric examples comparing GDP and GDP per capita and list three limitations (distribution, non-market activity, living standards).
Causes of inflation — cost-push vs demand-pull · 3.3
Complete misses on identifying cost-push scenarios.
Action: Review supply-side shock examples (wage/input cost increases) and practise classifying short scenarios as demand-pull or cost-push.
Open-economy FX diagrams and policy schools · 4.5 / 1.2
Long response times and mixed accuracy on FX and policy-definition items.
Action: Sketch FX shifts for 4 scenarios and write 2–3 sentence summaries of monetarism vs Keynesian views to build speed.
4. Question Evidence
Featured Questions
Most Wrong Questions
| Question | Topic | Unit | Attempts | Correct | Wrong | Avg Time |
|---|---|---|---|---|---|---|
| How is market demand derived from individual demand? | Microeconomics | 2.1 | 8 | 37.5% | 0.0% | 15.0 s |
| Which concept is associated with Karl Marx's critique of capitalism? | Introduction to Economics | 1.2 | 9 | 44.4% | 0.0% | 11.0 s |
| Why is GDP per capita used? | Macroeconomics | 3.1 | 4 | 0.0% | 0.0% | 13.1 s |
Most Correct Questions
| Question | Topic | Unit | Attempts | Correct | Wrong | Avg Time |
|---|---|---|---|---|---|---|
| What is a key goal of the circular economy model? | Introduction to Economics | 1.2 | 12 | 100.0% | 0.0% | 8.0 s |
| What does social or community surplus represent? | Microeconomics | 2.3 | 11 | 100.0% | 0.0% | 11.9 s |
| What does the concept of opportunity cost refer to? | Introduction to Economics | 1.1 | 10 | 100.0% | 0.0% | 10.8 s |
Most Time Spent Questions
| Question | Topic | Unit | Attempts | Correct | Wrong | Avg Time |
|---|---|---|---|---|---|---|
| Which of the following best defines monetarism? | Introduction | 1.2 | 3 | 66.7% | 0.0% | 1.6 min |
| European firms sharply increase their purchases of US-made AI software. In the foreign exchange market for the US dollar (USD) against the euro, what happens on the diagram? | Global Economy | 4.5 | 3 | 33.3% | 0.0% | 1.4 min |
| What happens when supply increases and demand remains constant? | Microeconomics | 2.3 | 9 | 88.9% | 0.0% | 1.3 min |
5. Conclusion
Next steps
Solid micro foundations give a good base — focus next week on practicing aggregation (market demand), clarifying GDP per capita and distinguishing inflation types, and doing a few timed diagram questions to build speed and confidence.
Note: This weekly report is automatically generated and may contain mistakes. Always double-check key points before using them for revision.
This report is based on anonymized aggregate quiz activity and question-level statistics; it does not include or imply any individual student data.