IBonomics2026-W42
Supply shifts and elasticity show the biggest gaps while demand basics remain strong
Aggregate quiz data this week shows consistent strength on demand fundamentals but recurring errors on supply shifts and elasticity concepts.
Published October 25, 2026
Total quiz attempts
164
Active learners
42
Average score
78.4%
Question accuracy
77.7%
Avg time per question
≈90 s
1. Weekly Overview
Demand fundamentals are solid; supply-side concepts need focused revision.
Across 164 attempts by 42 learners, accuracy averaged about 78%. Questions on the role of prices and consumer surplus scored very high, while items testing shifts in supply and elasticity (including perfectly elastic demand and price elasticity of supply) produced the lowest correct rates. A few macro diagram questions showed unusually long response times, suggesting careful thinking or uncertainty.
Student takeaway: Prioritise targeted practice on supply shifts and elasticity (PES and perfectly elastic demand) and reinforce diagram work for long-run macro shifts.
2. Key Patterns
Main Insights
Major weakness — elasticity and perfectly elastic demand
A question asking what a perfectly elastic demand curve looks like had 0% correct (4 attempts), and other elasticity items (PES interpretation) also show very low accuracy, indicating confusion about extreme elasticities and their graphical meaning.
Advice: Review definitions and graphs for perfectly elastic and perfectly inelastic demand; practice sketching curves and linking elasticity language (infinite, horizontal, vertical) to diagrams and short-answer explanations.
Confusion between shifts in supply and movements along supply
The item on which factors cause a supply curve to shift had a low correct rate (~35.7%), suggesting learners are mixing up price-induced movements with non-price determinants that shift supply.
Advice: Make two quick lists (movement vs shift) and practice with 6–8 short multiple-choice items: identify whether a change is a price change (movement) or a determinant change (shift).
Strength — core demand concepts are well understood
Questions on consumer surplus and the role of prices in the price mechanism were answered correctly by nearly everyone, showing reliable understanding of basic demand theory.
Advice: Keep practising application problems that combine these demand basics with supply changes so strengths transfer to related topics.
Long response times on some macro diagram and equity questions
Several macro and equity questions showed very high average times (minutes rather than seconds), which can indicate deeper processing or hesitation when applying AD–SRAS–LRAS diagrams and equity/poverty definitions.
Advice: When working diagram questions, practice faster sketching and labelling routines: state the shock, indicate AD/SRAS/LRAS shifts, and write one sentence linking the shift to the policy or event.
3. Revision Plan
Priority Areas
Elasticity (including perfectly elastic demand) · 2.5
Items on perfect elasticity scored 0% and PES interpretation was also weak.
Action: Sketch and label extreme elasticity graphs; practice 8 quick-definition + diagram flash drills and 5 short numerical PES calculations.
Determinants of supply vs movement along supply · 2.2
Low correct rate on supply-shift identification shows confusion between price effects and non-price determinants.
Action: Make two-column notes (movement vs shift) and complete 10 MCQs that ask you to classify changes and redraw supply curves accordingly.
Price elasticity of supply (PES) and flat/steep supply curves · 2.6
Questions about flat supply curves and PES had very low accuracy (~20%).
Action: Work through PES examples (short-run vs long-run) and interpret slopes: convert slope intuition to elasticity statements in one sentence each.
AD–SRAS–LRAS diagram practice (long-run shifts) · 3.5
High time spent suggests hesitation when mapping policies to long-run shifts.
Action: Do timed diagram drills (5 minutes each): identify the shock, shift the correct curve(s), and state the impact on output and price level.
4. Question Evidence
Featured Questions
Most Wrong Questions
| Question | Topic | Unit | Attempts | Correct | Wrong | Avg Time |
|---|---|---|---|---|---|---|
| Which of the following would cause a shift in the supply curve? | Microeconomics | 2.2 | 14 | 35.7% | 64.3% | 16.8 s |
| What happens when supply increases and demand remains constant? | Microeconomics | 2.3 | 15 | 60.0% | 40.0% | 40.3 s |
| How is market demand derived from individual demand? | Microeconomics | 2.1 | 13 | 61.5% | 38.5% | 40.4 s |
| What does a perfectly elastic demand curve look like? | Microeconomics | 2.5 | 4 | 0.0% | 100.0% | 15.1 s |
| If a supply curve is flat, what does this indicate about PES? | Microeconomics | 2.6 | 5 | 20.0% | 80.0% | 18.9 s |
Most Correct Questions
| Question | Topic | Unit | Attempts | Correct | Wrong | Avg Time |
|---|---|---|---|---|---|---|
| What is consumer surplus? | Microeconomics | 2.3 | 16 | 100.0% | 0.0% | 21.5 s |
| What is the role of prices in the price mechanism? | Microeconomics | 2.3 | 15 | 100.0% | 0.0% | 15.2 s |
| According to the law of demand, what happens when the price of a good increases, assuming ceteris paribus? | Microeconomics | 2.1 | 16 | 93.8% | 6.3% | 42.2 s |
| Which of the following is NOT a non-price determinant of demand? | Microeconomics | 2.1 | 15 | 93.3% | 6.7% | 10.7 s |
| If the number of firms in a market increases, what happens to the market supply? | Microeconomics | 2.2 | 17 | 82.4% | 17.6% | 27.0 s |
Most Time Spent Questions
| Question | Topic | Unit | Attempts | Correct | Wrong | Avg Time |
|---|---|---|---|---|---|---|
| What is the main distinction between equality and equity in economics? | Macroeconomics | 3.4 | 5 | 60.0% | 40.0% | 21.4 min |
| What is a key criticism of the free market regarding equity? | Microeconomics | 2.12 | 3 | 100.0% | 0.0% | 5.5 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% | 3.6 min |
| Which is a key difficulty in measuring poverty? | Macroeconomics | 3.4 | 3 | 100.0% | 0.0% | 2.0 min |
| What happens if the price is set below the equilibrium price? | Microeconomics | 2.3 | 14 | 78.6% | 21.4% | 1.8 min |
5. Conclusion
Actionable next steps
Focus short revision sessions on supply shifts and elasticity (diagrams + short answers), then practice timed diagram questions for macro long-run shifts; leverage strong grasp of demand basics by applying them in mixed supply–demand problems.
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 from the indicated week and does not reference individual student data.