Find an equilibrium and an imbalance
See this course’s project requirements
A fictional local-market analysis with demand/supply schedules, equilibrium, shifts, opportunity costs and a bounded price-change explanation.
Keep your working files in your own notebook or software. Save a private description, checklist, and work link in My Proof.
What to include
- An opportunity-cost table with feasible alternatives and explicit value assumptions.
- A demand table and price-change quantity explanation.
- A supply table with matched units and a condition-change note.
- A market-balance table with model equilibrium and limits.
- A shift/movement comparison with an explicit causal-assumption note.
- A complete fictional microeconomic market brief.
Review and revise
Use these criteria to check your work and choose what to improve.
- All supplied records reconcile and the decision uses the named case rules.
- Calculations show units, intermediate values and a second check.
- Changed-input practice revises the affected result and identifies uncertainty.
- The final project combines six lesson records, separates fictional assumptions from current rules, and states a supported next step.
Want more background?
The idea in everyday life
This is an original fictional practice case. No account, payment, personal record or outside participation is required. Complete weekly notebook schedule: $2 demand 90/supply 30; $4 demand 70/supply 50; $5 demand 60/supply 60; $6 demand 50/supply 70.
Compare demand and supply at each price; equality in a supplied schedule is a model equilibrium, not a prediction of the real world.
Find an equilibrium and an imbalance — worked practice
Compare demand and supply at each price; equality in a supplied schedule is a model equilibrium, not a prediction of the real world.
Use paper or a local table; label all amounts as fictional USD unless the case names another unit. Complete weekly notebook schedule: $2 demand 90/supply 30; $4 demand 70/supply 50; $5 demand 60/supply 60; $6 demand 50/supply 70.
Complete fictional market schedule
Paste at A1.
| APrice USD | BDemand per week | CSupply per week |
|---|---|---|
| 2 | 90 | 30 |
| 4 | 70 | 50 |
| 5 | 60 | 60 |
| 6 | 50 | 70 |
Copy as plain text
1. Step 1: Make price/demand/supply/gap columns
Make price/demand/supply/gap columns.
You should see: Gap means demand minus supply.
Compare demand and supply at each price; equality in a supplied schedule is a model equilibrium, not a prediction of the real world.
2. Step 2: Calculate the $4 shortage
Calculate the $4 shortage.
You should see: 70−50=20 notebooks/week.
Keep this intermediate result so the final decision can be checked.
3. Step 3: Calculate the $6 surplus
Calculate the $6 surplus.
You should see: 70 supplied−50 demanded=20 notebooks/week.
Keep this intermediate result so the final decision can be checked.
4. Step 4: Identify the equal-quantity row
Identify the equal-quantity row.
You should see: At $5 both equal 60; model equilibrium price $5 and quantity 60.
Keep this intermediate result so the final decision can be checked.
What to finish
A market-balance table with model equilibrium and limits.
Watch for this
Reversing shortage and surplus by changing the subtraction direction.
How can I tell I understand it?
Calculate shortages/surpluses and identify equality in a complete supplied market schedule on the supplied changed case while preserving the stated rule and checking the final record.
Quick knowledge check
Answer all 3 questions. Get at least 2 right and the lesson completes automatically.
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Answer all 3 questions above and get at least 2 right. You can review the explanations and try again.
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Sources and further reading
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Source & access notes · checked 2026-10-01
Official page opened/read during Money expansion authoring; checked the relevant concept and access state. These sources do not establish funding eligibility.
Access: Official resource page and its readable overview/transcript inspected; no external LMS lesson or media playback is claimed.
Reuse: Original fictional practice, questions and calculations; paraphrased concepts with a source link. No source exercise copied.
Source & access notes · checked 2026-10-01
Official page opened/read during Money expansion authoring; checked the relevant concept and access state. These sources do not establish funding eligibility.
Access: Official resource page and its readable overview/transcript inspected; no external LMS lesson or media playback is claimed.
Reuse: Original fictional practice, questions and calculations; paraphrased concepts with a source link. No source exercise copied.
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