IBonomics2026-W43
Students struggle with aggregating individual supply into market supply
This week’s aggregate quiz data shows strong mastery of equilibrium and surplus concepts but clear weakness in deriving market supply from individual suppliers and some confusion on elasticity and economic thinkers.
Published November 1, 2026
Total attempts (week)
254
Active students (unique)
38
Average score
78.8%
Question accuracy (avg)
78.1%
Total XP earned
13,442
1. Weekly Overview
Good overall scores but key gaps in supply aggregation and some intro topics
Average scores are healthy (≈79%), with particularly strong performance on equilibrium and surplus questions in Microeconomics (Unit 2.3). The largest recurring errors center on how individual supply curves combine into a market supply curve and on a few basic elasticity and introductory thinkers questions.
Student takeaway: Prioritise practice on aggregating individual supply curves, review the meaning of perfectly inelastic supply (PES = 0), and refresh core facts about monetarism and Marxian concepts.
2. Key Patterns
Main Insights
Difficulty deriving market supply from individual supply
The strongest signal of weakness is from a Microeconomics (Unit 2.2) question: many students selected incorrect answers when asked how market supply is derived from individual supply curves.
Advice: Practice drawing multiple individual supply curves and summing horizontal quantities at given prices to form the market supply; do several graph-to-numerical conversion exercises.
Confusion about perfectly inelastic supply (PES = 0)
A straightforward PES definition item (Unit 2.6) also had low accuracy, indicating some students mix up elasticity definitions and their graphical implications.
Advice: Review the definition of PES, identify textbook examples (e.g., fixed quantity inputs), and practise classifying supply elasticity from short descriptions and graphs.
Introductory economic thinkers are a weak spot
Questions on Milton Friedman/monetarism and Marxian concepts in Introduction to Economics (Unit 1.2) showed low correct rates, suggesting recall-based gaps.
Advice: Use concise comparison notes (monetarism vs Keynesianism vs Marx) and timed recall quizzes to fix key associations and definitions.
Clear strength on equilibrium and surplus concepts
Multiple Unit 2.3 items (market equilibrium, consumer and community surplus, allocative efficiency) had high correct rates, indicating solid conceptual understanding in these areas.
Advice: Consolidate this strength by doing mixed practice (apply surplus and equilibrium reasoning to policy questions and small graph shifts).
3. Revision Plan
Priority Areas
Market supply aggregation (summing individual supplies) · 2.2
Lowest-accuracy medium-difficulty question with the largest attempt count among weak items.
Action: Do step-by-step graph exercises: given individual supply schedules, compute and plot total market supply; practice several numerical examples.
Price elasticity and extreme values (PES = 0) · 2.6
Confusion on definitions of perfectly inelastic supply could affect applied questions.
Action: Review definitions, label curves on graphs, and work short-answer problems describing real examples of inelastic supply.
Introduction to economic thinkers (monetarism vs Marxian concepts) · 1.2
Low recall accuracy on basic thinker-identification items.
Action: Create a 1-page comparison sheet and run 5–10 minute timed recall quizzes for key schools of thought.
Foreign exchange effects of trade policy · 4.5
Policy-to-forex mapping (e.g., import reduction -> currency demand/supply) showed errors.
Action: Practice mapping trade flows to currency demand/supply with 4–6 short scenarios and diagrams.
4. Question Evidence
Featured Questions
Most Wrong Questions
| Question | Topic | Unit | Attempts | Correct | Wrong | Avg Time |
|---|---|---|---|---|---|---|
| How is market supply derived from individual supply? | Microeconomics | 2.2 | 13 | 30.8% | 69.2% | 48.1 s |
| Milton Friedman and the monetarist school emphasized: | Introduction to Economics | 1.2 | 7 | 14.3% | 85.7% | 18.8 s |
| Which concept is associated with Karl Marx's critique of capitalism? | Introduction to Economics | 1.2 | 4 | 0.0% | 100.0% | 16.3 s |
| If PES = 0, supply is considered: | Microeconomics | 2.6 | 5 | 20.0% | 80.0% | 8.0 s |
| A Buy American campaign reduces US imports of South African wine. What happens to the dollar in the foreign exchange market? | Global Economy | 4.5 | 6 | 33.3% | 66.7% | 21.6 s |
Most Correct Questions
| Question | Topic | Unit | Attempts | Correct | Wrong | Avg Time |
|---|---|---|---|---|---|---|
| What is true at the market equilibrium point? | Microeconomics | 2.3 | 14 | 92.9% | 7.1% | 13.3 s |
| What does social or community surplus represent? | Microeconomics | 2.3 | 12 | 100.0% | 0.0% | 21.1 s |
| What is consumer surplus? | Microeconomics | 2.3 | 13 | 92.3% | 7.7% | 12.7 s |
| What distinguishes a movement along the demand curve from a shift of the curve? | Microeconomics | 2.1 | 13 | 92.3% | 7.7% | 51.0 s |
| What does the law of supply state? | Microeconomics | 2.2 | 14 | 85.7% | 14.3% | 10.6 s |
Most Time Spent Questions
| Question | Topic | Unit | Attempts | Correct | Wrong | Avg Time |
|---|---|---|---|---|---|---|
| Which of the following increases the price elasticity of demand for a good? | Microeconomics | 2.5 | 5 | 100.0% | 0.0% | 283.7 min |
| The European Central Bank (ECB) launches a large-scale asset purchase programme (quantitative easing) to prevent deflation in the euro area. In the standard AD–SRAS model, which curve shifts first in response to this policy, and in which direction? | Macroeconomics | 3.5 | 4 | 75.0% | 25.0% | 24.3 min |
| When does allocative efficiency occur? | Microeconomics | 2.3 | 11 | 81.8% | 18.2% | 21.4 min |
| Due to an AI takeover that ends in all technology being wiped out, many firms end up operating with outdated machinery and inefficient production methods. In the three-curve diagram, which curve is most directly influenced and in which direction does it shift? | Macroeconomics | 3.2 | 3 | 66.7% | 33.3% | 8.9 min |
| 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 | 4 | 75.0% | 25.0% | 8.6 min |
5. Conclusion
Target supply aggregation and quick recall of definitions
Keep building on your clear strengths in equilibrium and surplus by doing short targeted practice on aggregating supply curves, elasticity definitions, and rapid recall of key thinkers; focused, small practice sets will yield the best improvement this week.
Note: This weekly report is automatically generated and may contain mistakes. Always double-check key points before using them for revision.
This report summarises anonymized, aggregate quiz activity and question-level statistics only; no individual student data is included.