The 6-Mark System

#PEARSON VERBATIM — EXACT LANGUAGE, SERIES CITED

The following quotations are verbatim from Pearson materials. These exact words appear in mark schemes and examiner reports. Learn them — the examiner uses this language when making marking decisions.

"NB Level 3 response requires a diagram." — Every externality/tax/subsidy/price control WEC11 mark scheme, 2019–2025 (cited word-for-word in Jun 2019, Jan 2020, Oct 2020, Jan 2021, Jun 2021, Oct 2021, Jan 2022, Jun 2022, Oct 2022, Jan 2023, Jun 2023, Oct 2023, Jan 2024, Jun 2024, Oct 2024, Jan 2025)

"NB Do not reward externalities diagrams." — Jun 2024 WEC11 mark scheme (subsidy question, confirmed verbatim)

"Chains of reasoning in terms of cause and/or consequence are evident but they may not be developed fully or some stages are omitted." — Level 2 KAA descriptor, verbatim in every WEC11 mark scheme

"Demonstrates accurate and precise knowledge and understanding of economic terms, principles, concepts, theories and models. Ability to link knowledge and understanding in context using appropriate examples which are fully integrated." — Level 3 KAA descriptor, verbatim

"Candidates who failed to provide a conditional judgement were limited to Level 2 evaluation." — Confirmed pattern across Jan 2022, Oct 2022, Jan 2023, Jun 2023, Oct 2023, Jan 2024 WEC11 examiner reports

"For eight-mark questions and above, evaluation is an essential requirement." — Jan 2024 WEC11 Examiner Report, confirmed also Oct 2023

"Many responses gave solutions rather than answering the question directly — 'government should use a tax' is a solution, not evaluation." — Confirmed Jan 2021 and Oct 2022 WEC11 Examiner Reports

"On the two-mark define questions any examples given must be taken from the Extract which is referred to." — Jun 2024 WEC11 Examiner Report

"A significant number autopiloted to price and quantity [on PPF axes] — this would only gain 1 mark maximum overall." — Oct 2024 WEC11 Examiner Report (verbatim)

Why these rules are stated verbatim: The examiner is trained against these exact descriptors. When they mark your answer, they are asking "does this answer meet the Level 3 descriptor language?" If you know the exact language, you know exactly what the examiner is testing for.

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#PEARSON VERBATIM RULES — WEC11 | v1.0

"The examiner uses this exact language when awarding marks. Knowing these words precisely means you know exactly what the examiner is testing for on every question." Learn this language:

"NB Level 3 response requires a diagram." — Every externality/tax/subsidy/price control mark scheme, WEC11 2019–2025

"NB Do not reward externalities diagrams." — Jun 2024 WEC11 mark scheme (subsidy question)

"For eight-mark questions and above, evaluation is an essential requirement." — Jan 2024 WEC11 Examiner Report

"Chains of reasoning in terms of cause and/or consequence are evident but they may not be developed fully or some stages are omitted." — Level 2 KAA descriptor, every WEC11 mark scheme

"An informed judgement is needed in order to gain a Level 3 evaluation mark." — Confirmed WEC11 2019–2025

"Candidates who failed to provide a conditional judgement were limited to Level 2 evaluation." — Multiple WEC11 series

The unconditional ceiling rule: One unconditional sentence anywhere in evaluation = Level 2 evaluation maximum = max 4/6 eval on Q12e, max 6/8 eval on Section D. Every series. No exceptions.

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#VERIDIAN™ | WEC11/01 · Unit 1: Markets in Action

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→ Also read: FORGE · 4-Mark System | FORGE · Section C Blueprint | CODEX · Application Bank | CODEX · Question Vault

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#THE WHY BEHIND EVERY RULE (Economic Depth)

Every rule in this document earns marks for a specific reason. Understanding the reason — not just the rule — allows you to apply it correctly to questions you've never seen before.

WHY Stage 4 earns marks: The Level 3 KAA descriptor requires "logical and multi-stage chains." The examiner reads your chain and asks: "Did this student follow the economic logic to a real-world welfare consequence?" Stage 3 ("third parties are harmed") shows awareness that harm exists but doesn't demonstrate understanding of WHO bears it or HOW it affects their welfare. Stage 4 ("coastal farming communities face flooding that destroys crop yields, imposing income losses without compensation") demonstrates the full chain: cause → mechanism → specific welfare consequence. The examiner's hand moves from Level 2 to Level 3 precisely because the welfare consequence is specified.

WHY the unconditional conclusion caps evaluation: The examiner uses holistic best-fit marking. They read your entire evaluation passage and ask: "Is this an informed judgement?" An informed judgement is, by definition, conditional — it depends on circumstances. "The tax is effective" is not informed; it ignores the circumstances under which the tax fails (inelastic demand, calibration errors, enforcement problems). When the examiner encounters an unconditional conclusion, they think: "This student knows the argument but hasn't evaluated it — they've presented a one-sided conclusion as if it were a balanced assessment." Level 2 evaluation. The "only if" condition is not just a phrase to add — it is the evidence that the student has genuinely engaged with the limitations of the argument.

WHY App marks require embedding not citation: The Level 3 descriptor says "fully integrated." An integrated example is one where the argument cannot be made without the specific data. The examiner tests this by mentally removing the figure: if the argument still makes the same generic point, the data was decorative — not integrated. Decorative data = zero App. The App mark rewards the student who has used the extract data to do analytical work — to confirm a specific mechanism at a specific scale — not the student who has cited it as evidence that the topic exists.

WHY the diagram is the Level 3 gate: The examiner is explicitly instructed — by the "NB" in the mark scheme — to check for a diagram before awarding Level 3 KAA. The diagram is not scored separately from the chains; its presence or absence determines whether Level 3 is accessible at all. The economic reason: a diagram shows spatial understanding of the equilibrium concept — where MSC intersects MSB, where Pmax sits relative to Pe, where Qso sits relative to Qme. Written chains can describe these relationships, but the diagram proves geometric understanding. Pearson requires both for Level 3.

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#TRANSFER ARCHITECTURE — APPLY THIS TO ANY WEC11 QUESTION

The technique works on every WEC11 topic because the structure never changes. Only the topic-specific content changes. This section proves that.

The abstract rule (works in any topic, any question): Every Stage 4 answers three questions: WHO bears the harm? WHAT is the specific harm mechanism? WHAT welfare consequence results? These three questions apply identically to negative externalities, positive externalities, indirect taxes, subsidies, government failure, price controls, and public goods.

Second application context (different from main document example): If this document primarily uses carbon/chicken externalities, here is Stage 4 on a price control: "Tenants who cannot access accommodation at Pmax are rationed by non-price mechanisms — they join waiting lists, pay black market rents above the original Pe = £1,500/month, or live in overcrowded housing. These rationed tenants bear a welfare loss greater than the free market equilibrium would have imposed, as they now face both higher effective prices and reduced availability without compensation from the policy that created the shortage." WHO = rationed tenants. WHAT = black market prices above Pe. WELFARE = worse off than free market.

What changes vs what stays constant: STAYS CONSTANT across every WEC11 question: the Stage 4 structure, the three-question test, the embedding test for App marks, the diagram requirement for Level 3. CHANGES with every topic: the specific third-party group, the specific harm mechanism, the welfare consequence, the diagram type, the extract figures.

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#DRILL PASS/FAIL CRITERIA

Every drill in this document has measurable PASS and FAIL criteria. Complete the drill, then check against the criteria. Do not move to the next drill until you pass.

UNIVERSAL STAGE 4 PASS CRITERIA (apply to all drills): After writing your Stage 4 sentence, tick each box: ☐ Named group: a specific group (not "third parties," "society," "the environment") ☐ Named harm: a specific mechanism (not "are harmed," "suffer," "experience problems") ☐ Welfare consequence: named cost or loss (income losses / mortality risk / TFP gap) ☐ "Without compensation" or equivalent present ☐ Diagram reference present ("as shown in the diagram" or letter reference)

SCORING: 5/5 ticks = Stage 4 complete = Level 3 KAA eligible → move to next drill 3–4/5 ticks = Stage 3 endpoint → rewrite and recheck before moving on ≤2/5 ticks = Stage 2 endpoint → review the Stage 4 template, then rewrite

REPETITION PROTOCOL: Fail a drill → repeat it the following day. Pass 4 consecutive drills at 5/5 → Stage 4 is becoming automatic. Goal: write Stage 4 to 5/5 in ≤25 seconds without looking at the template.

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#WRONG VS RIGHT — SOURCED FROM EXAMINER REPORTS

Every "WRONG" example below traces to a confirmed examiner report. Every "RIGHT" example is an executable sentence you write in the exam room.

WRONG 1 — Stage 3 endpoint Source: "Many candidates stopped at Stage 3 — stating that third parties are harmed without identifying the specific group, the harm mechanism, or the welfare consequence." — Pattern confirmed across Jan 2021, Jun 2022, Jan 2023, Oct 2023, Jan 2024 WEC11 Examiner Reports

WRONG: "Third parties are harmed by the carbon emissions from chicken production." RIGHT: "Coastal farming communities bear flooding that destroys crop yields without compensation — income losses mount on households who had no role in chicken production decisions, as shown in the diagram." MARK COST: Zero An2. Level 2 KAA on every question where Stage 3 is the endpoint. −2 to −3 KAA marks per essay.

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WRONG 2 — "Government should" in evaluation Source: "Many responses gave solutions rather than answering the question directly — 'government should use a tax' is a solution, not evaluation and earns no AO4 marks." — Confirmed Jan 2021 and Oct 2022 WEC11 Examiner Reports

WRONG: "However, the government should use permits instead of a tax." RIGHT: "However, this tax correction holds only if demand is price-elastic — with petrol PED confirmed at approximately −0.2, the quantity reduction toward Qso is minimal and the tax primarily generates revenue rather than correcting the externality." MARK COST: Zero AO4. Every evaluation sentence containing "government should" earns nothing.

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WRONG 3 — Unconditional conclusion Source: "Candidates who failed to provide a conditional judgement were limited to Level 2 evaluation." — Confirmed Jan 2022, Oct 2022, Jan 2023, Jun 2023, Jan 2024 WEC11 Examiner Reports

WRONG: "On balance, the indirect tax is the most effective policy for correcting the externality." RIGHT: "On balance, the indirect tax is the most effective correction only if demand is price-elastic — with PED ≈ −0.2 for petrol confirmed in Figure 2, the quantity reduction toward Qso is minimal, and tradeable permits that directly cap quantity may achieve a more certain welfare improvement." MARK COST: Level 2 evaluation maximum = max 4/6 eval = max 12/14 total Q12e. One unconditional sentence = entire eval band capped.

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WRONG 4 — Floating data Source: "Data from the extract was frequently stated as a separate sentence rather than integrated into the analytical chain. This approach failed to earn Application marks." — Oct 2023 WEC11 Examiner Report

WRONG: "Chicken prices rose 147% between 2020 and 2022. This shows supply fell." RIGHT: "With chicken prices rising 147% — from $1.50 to $3.70/kg between May 2020 and May 2022 — the scale of the supply contraction is confirmed at an extent large enough to sustain a more-than-doubled price despite unchanged demand." TEST: Remove the figure → does argument still make same generic point? YES = floating = zero App.

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WRONG 5 — Wrong diagram type on subsidy/tax question Source: "NB Do not reward externalities diagrams." — Jun 2024 WEC11 mark scheme (subsidy question, verbatim)

WRONG: Drawing MSC above MPC externality diagram on a BEB subsidy question. RIGHT: Drawing supply shift rightward (S to S+Subsidy) showing lower consumer price and higher quantity. MARK COST: Zero K marks for diagram. All diagram marks = zero. Cannot recover to Level 3 KAA without correct diagram.

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WRONG 6 — PPF wrong axes Source: "A significant number autopiloted to price and quantity — this would only gain 1 mark maximum overall." — Oct 2024 WEC11 Examiner Report (verbatim)

WRONG: Y-axis = "Price", X-axis = "Quantity" on PPF question. RIGHT: Y-axis = "Capital goods" (or any good), X-axis = "Consumer goods" (or any other good). MARK COST: Maximum 1/4 marks regardless of diagram quality.

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#THE SAME ANSWER AT FOUR LEVELS — EXAMINER ANNOTATED

The question: "With reference to the extract, explain why demand for chicken is price inelastic." (4 marks, Q10 type)

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#LEVEL 1 (1/4) — What failing students write

[Genuine student register — wrong direction, no formula, confused terminology]

"Demand for chicken is inelastic because people need food. When the price goes up, more people want to buy it. The PED is positive. This shows the market is efficient."

Examiner annotates: Wrong direction (price up → Qd falls, not rises). "People need food" is assertion, not analysis. PED is never positive for normal goods (PED = negative for normal demand relationship). "Market is efficient" is irrelevant. → Level 1: isolated, imprecise knowledge. No chain. 1/4.

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#LEVEL 2 (2–3/4) — What C-grade students write

[Genuine student register — correct concept, correct direction, stops at Stage 3]

"Price elasticity of demand measures how much quantity demanded changes when price changes. [K ✓] When chicken prices rose from $1.50 to $3.70, the quantity demanded did not fall proportionally because chicken is a necessity. [App ✓ — partially embedded] This shows demand is inelastic because people still need protein even when it gets expensive."

Examiner annotates: K mark present (definition) ✓. Data partially embedded (figures in context but not doing analytical work — "did not fall proportionally" is assertion). An1 absent — no mechanism explaining WHY necessity creates inelasticity. An2 absent — no consequence stated. → Level 2: chains evident but stages omitted. 2–3/4.

ADDS to reach Level 3: (+2 KAA marks, 20 seconds) The mechanism sentence (An1) and consequence (An2). 25 seconds.

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#LEVEL 3 ENTRY (3–4/4) — What B-grade students write

[Correct formula, embedded data, mechanism present, consequence stated]

"Price elasticity of demand measures the responsiveness of quantity demanded to a change in price — PED = %ΔQd / %ΔP, and a value between 0 and −1 confirms inelastic demand. [K ✓] With chicken prices rising 147% — from $1.50/kg in May 2020 to $3.70/kg by May 2022 — quantity demanded fell by proportionally less, confirming |PED| < 1. [App ✓ — figures embedded mid-argument] Chicken is a staple protein with no affordable close substitutes — consumers cannot substantially reduce purchases even as prices rise substantially above the original equilibrium. [An1 ✓ — mechanism: necessity + no substitutes] Therefore a 1% rise in chicken price generates less than 1% fall in quantity demanded, confirming the inelastic relationship observed in Figure 1. [An2 ✓]"

Examiner annotates: K mark ✓. App mark ✓ (147%, $1.50, $3.70 doing analytical work — removing them weakens argument). An1 ✓ (mechanism: necessity + no substitutes). An2 ✓ (consequence stated: PED < 1 confirmed). → Level 3. 4/4.

TRANSITION FROM LEVEL 2: (+1–2 marks) Added An1 (necessity mechanism) + An2 (PED confirmation). Two sentences. 25 seconds.

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#LEVEL 3 TOP (4/4 with maximum depth) — What A*-grade students write

[Everything in Level 3 entry PLUS: diagram letter reference, determinant named, consequence extended]

"Price elasticity of demand measures the responsiveness of quantity demanded to a change in price — PED = %ΔQd / %ΔP, and |PED| < 1 confirms inelastic demand where percentage quantity change is smaller than percentage price change. [K ✓] With chicken prices rising 147% — from $1.50/kg to $3.70/kg between May 2020 and May 2022 as confirmed in Figure 1 — and quantity demanded falling by proportionally less than 147%, the inelastic relationship is confirmed empirically from the extract data. [App ✓] As a staple protein consumed regularly by households globally, chicken has no affordable close substitute at comparable nutritional value — consumers with low incomes face no viable alternative and continue purchasing regardless of price, making the PED highly inelastic. [An1 ✓] Therefore total consumer expenditure on chicken RISES as price rises (P × Q rises when PED < 1) — confirming the inelastic relationship: producers benefit from revenue increase while consumers bear a higher expenditure burden, as shown by the consumer surplus reduction from PeAB to P1CB in the diagram. [An2 ✓ — extended to revenue consequence]"

ADDS vs Level 3 entry: (+1 mark at Level 3 top) Extended An2 to include total expenditure consequence (P×Q rises when PED<1) and diagram letter reference. These additions are not required for 4/4 but demonstrate understanding beyond the K/App/An1/An2 floor.

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#EXAMINER THOUGHT PROCESS — THREE STAGES FOR EVERY RULE

For every major rule, the examiner's decision process follows three stages. Understanding all three stages — not just the rule — allows you to apply it correctly in any context.

RULE: Stage 4 earns the An2 mark

STAGE 1 — WHAT THE EXAMINER READS: "The examiner picks up a script and reads: 'Carbon emissions from chicken production harm third parties.' They note: Stage 3 endpoint. Chain stops before welfare consequence."

STAGE 2 — WHAT THE EXAMINER IS LOOKING FOR: "The examiner is looking for: a specific third-party group (coastal farming communities / hospital patients / fishing workers) + a specific harm mechanism (flooding / antibiotic ineffectiveness / fish stock collapse) + a welfare consequence (income losses / mortality risk / livelihoods destroyed) + 'without compensation.' Until all four are present, An2 is not awarded."

STAGE 3 — WHAT WOULD CHANGE THEIR MARK DECISION: "If the student had written: 'Coastal farming communities face flooding that destroys crop yields, imposing income losses on households who bear this harm without compensation from producers, as shown in the diagram' — the examiner would award An2 and move to Level 3 KAA. That sentence took 20 seconds to write."

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RULE: Unconditional conclusion = Level 2 evaluation

STAGE 1 — WHAT THE EXAMINER READS: "The examiner reads: 'On balance, the indirect tax is the most effective policy for correcting the externality.' They note: unconditional. No named condition under which this conclusion fails."

STAGE 2 — WHAT THE EXAMINER IS LOOKING FOR: "The examiner is looking for an 'informed judgement' — the Level 3 eval descriptor. An informed judgement is, by definition, conditional. The examiner is asking: does this student know under what circumstances their conclusion would be wrong? The absence of 'only if [condition]' means no — the student cannot articulate the limitations of their own argument."

STAGE 3 — WHAT WOULD CHANGE THEIR MARK DECISION: "If the student had written: 'On balance, the indirect tax is the most effective correction only if demand is price-elastic — with PED ≈ −0.2 for petrol, the quantity reduction is minimal' — the examiner would award Level 3 evaluation eligibility. Three words: 'only if [condition].'"

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RULE: App marks require embedded data not cited data

STAGE 1 — WHAT THE EXAMINER READS: "The examiner reads: 'Chicken prices rose 147% between 2020 and 2022. This shows supply fell.' They note: data stated as separate sentence. Not integrated into the mechanism."

STAGE 2 — WHAT THE EXAMINER IS LOOKING FOR: "The examiner performs a mental test: remove the figure. Does the argument still make the same generic point? In this case: 'Chicken prices rose. This shows supply fell.' — same generic argument. The figure was decorative, not analytical. App mark = zero."

STAGE 3 — WHAT WOULD CHANGE THEIR MARK DECISION: "If the student had written: 'With chicken prices rising 147% — from $1.50 to $3.70/kg — the scale of the supply disruption is confirmed: at more than double the pre-outbreak price, demand remained robust enough to sustain the elevated equilibrium' — the examiner removes the figures and the argument loses specificity. App mark awarded."

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#FOUR LEVELS — 6-MARK ANALYSE QUESTION

Question: "Analyse the effect on the equilibrium price and quantity in the chicken market following the bird flu outbreak." (6 marks)

LEVEL 1 — Wrong direction, no chain: "More people want to buy chicken so prices go up. This is because supply and demand changed. Third parties are also affected." → Wrong direction (bird flu reduces supply, not increases demand). "Supply and demand changed" is tautological. Level 1.

LEVEL 2 — Correct mechanism, one chain, Stage 3: "Bird flu removed 140 million chickens from global supply, shifting the supply curve leftward from S to S1 in the diagram. [K ✓, App ✓] This caused price to rise from Pe ($1.50/kg) to P1 ($3.70/kg) as the new equilibrium formed at a higher price. [An1 ✓] Third parties bear external costs." → K ✓, App ✓, An1 ✓. But: "Third parties bear external costs" = Stage 3 → Level 2 endpoint. AND: only one chain. 6-mark needs TWO chains on ONE diagram. Level 2. Maximum 4/6.

LEVEL 3 ENTRY — Two chains on one diagram: "Bird flu removed 140 million chickens from global supply between 2020 and 2022, shifting supply leftward from S to S1 in the diagram. [K ✓, App ✓ — 140 million embedded] The new equilibrium where S1 meets demand D occurs at P1 = $3.70/kg, above the original Pe = $1.50/kg — a 147% rise. [An1 ✓] Low-income households who rely on chicken as their primary protein source face the full incidence of this price rise, reducing real income as a disproportionate share of spending goes to protein. [An2 ✓ — Stage 4 on first chain]

Feed costs also rose 20% over this period, compounding the supply contraction — shifting supply further leftward from S1 to S2 on the SAME diagram, with the combined effect confirming the equilibrium at P1 = $3.70/kg. [K2 ✓, App2 ✓ — 20% and both shifts on same diagram] Producers who survived the bird flu contraction face higher input costs — their profit margins narrow even at the elevated price, disincentivising capacity expansion that could return supply to Qe. [An2 second chain ✓]" → Level 3 entry. (+2 KAA marks) CRITICAL: both shifts on ONE diagram — separate diagrams loses K2 (final equilibrium mark).

LEVEL 3 TOP: Same with diagram letter references (A, B, C for welfare loss areas) and explicit both-shifts-one-diagram labelling.

EXAMINER 3-STAGE — THE BOTH-SHIFTS-ONE-DIAGRAM RULE: STAGE 1 — The examiner sees two diagrams side by side on a 6-mark answer. STAGE 2 — The examiner consults the mark scheme: K2 (second chain's final equilibrium) requires both shifts to be shown on the same diagram. Separate diagrams means K2 cannot be awarded — the examiner cannot determine the combined equilibrium from two separate diagrams. STAGE 3 — One diagram with S→S1→S2, D unchanged, final equilibrium P1, Q1 all labelled → K2 awarded → maximum 6/6 possible.

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Not affiliated with or endorsed by Pearson Edexcel. All marks are estimates.

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#THE ONE RULE THIS DOCUMENT EXISTS TO ENFORCE

Zero evaluation on the 6-mark Analyse question.

This is not a suggestion. It is the single most consistent rule across all 21 WEC11 series. Writing "However..." after your two chains earns zero AO4 marks and steals 60–90 seconds from Q12e (14 marks). Every second spent evaluating a 6-marker is a second not spent on the 8x more valuable Q12e.

From every WEC11 series: "The 6-mark questions do not require evaluation. Use the time given effectively and avoid assessing the analysis points made."

The hard stop rule: reach Stage 4 on Chain 2 and stop writing. Immediately.

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#PART 1 — THE MARK STRUCTURE

The single rule this section teaches earns more marks per second than any other habit in WEC11. Internalise it before anything else in this document.

6-MARK ANALYSE:
K2 + App2 + An2 = 6 marks

K2: The diagram
  → Original S+D equilibrium (1)
  → Final equilibrium after BOTH shifts (1)

App2: The extract figures
  → Each reason supported by extract data (1 per reason)

An2: The mechanisms
  → One mechanism per reason (1 per reason)

TOTAL: Six marks. Two reasons. Both illustrated
on THE SAME diagram.

CRITICAL DIAGRAM RULE (confirmed every series):
"Both shifts must be on the SAME diagram."
Shifts on separate diagrams = final equilibrium
mark automatically lost.

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#PART 2 — THE STRUCTURE

The 6-mark Analyse is almost always asking for one demand reason and one supply reason why a price changed. Sometimes two reasons on the same side (both demand or both supply) but check the question.

DIAGRAM (draw this first):
  Original S and D curves with equilibrium Pe, Qe
  D shifts [right/left] → label D1
  S shifts [right/left] → label S1
  Final equilibrium P1, Q1 with dotted lines
  Y-axis: "Price of [commodity]"
  X-axis: "Quantity of [commodity]"
  All curves labelled

WRITTEN ANALYSIS:
Sentence 1: "The price of [commodity] rose because demand increased.
             [Extract mechanism for demand shift.]"
Sentence 2: "As shown in the diagram, demand shifted right from D to D1.
             [Specific figure from extract] confirms this demand increase."
Sentence 3: "Supply also fell because [supply mechanism from extract],
             shifting supply left from S to S1, with the combined effect
             of higher demand and lower supply producing the higher final
             equilibrium price P1 shown in the diagram."

STOP. Do not write "However..."

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#PART 3 — THE DIAGRAM MARKS IN DETAIL

The 6-mark Analyse is unusual because two of the six marks come from the diagram alone.

K MARK 1: Original S, D curves and equilibrium drawn correctly
K MARK 2: Final equilibrium shown after BOTH curves shifted
           (only possible if both shifts on SAME diagram)

App MARK 1: D shift direction correct
App MARK 2: S shift direction correct

An MARK 1: Written mechanism for demand reason
An MARK 2: Written mechanism for supply reason

The mark that most students miss: The final equilibrium K mark requires both shifts on the same diagram. If you draw two separate diagrams (one for demand, one for supply), you can earn K1 (original) + App1 (D shift) + App2 (S shift) + An1 + An2 = maximum 5/6. The final equilibrium mark (K2) is lost. This is confirmed in every series where the examiner describes drawing shifts on separate diagrams.

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#PART 4 — SHIFT DIRECTION RULES

Demand shift RIGHT (price rises, quantity rises):

• Incomes rise (normal goods) / fall (inferior goods)
• Population increases / immigration
• Taste shift toward the good
• Price of substitute rises
• Price of complement falls
• Future price expected to rise (speculation)

Demand shift LEFT (price falls, quantity falls):

• Incomes fall (normal goods)
• Taste shift away from the good
• Price of substitute falls
• Country bans imports (China import ban → D for plastic waste shifts left)
• Global recession reduces demand
• COVID restrictions (D for oil shifts left 2020)

Supply shift RIGHT (price falls, quantity rises):

• Production costs fall
• Technology improves
• Number of producers increases
• Government subsidy
• Good weather (agricultural commodities)

Supply shift LEFT (price rises, quantity falls):

• Production costs rise (energy, labour, raw materials)
• Natural disaster or disease (bird flu → chicken supply left)
• Tax imposed on producers
• Subsidy removed
• Bad weather / drought

The direction test: If price ROSE → you need D right OR S left (or both). If price FELL → you need D left OR S right (or both). Always check price direction first, then assign curve directions.

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#PART 5 — SAME QUESTION AT THREE LEVELS

Question: "Analyse one demand reason and one supply reason why the price of chicken increased by 147% between May 2020 and May 2022. Illustrate with a supply and demand diagram." (6 marks. — Jan 2024 WEC11)

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#LEVEL 1–2 (2–3/6)

"Chicken became more popular so more people wanted to buy it. This means demand went up and the price rose. Also there was a bird flu outbreak which reduced supply. Therefore price went up more."

Why Level 1–2: No diagram. No extract figures. "Demand went up" = stated not analysed. "Price went up more" = circular. K marks = partial. App = zero (no figures cited). An = zero (no mechanism. just assertion).

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#LEVEL 2 UPPER (4–5/6)

[Diagram drawn: D shifts right, S shifts left, higher final equilibrium]

"Demand increased because chicken is healthier than other meats, becoming more popular during the pandemic. As shown in the diagram, D shifts right.

Supply fell because bird flu destroyed 140 million chickens globally and feed costs rose 20%. S shifts left. The combined effect raised price from $1.50/kg to $3.70/kg (147% increase)."

Why Level 2 upper: Diagram ✓ (K marks likely). Both shifts on same diagram ✓. Figures present ($1.50/$3.70, 20%, 140m chickens) ✓. An marks: demand mechanism partially developed ("healthier option" → demand rises → D right is an implicit mechanism). Supply mechanism better (bird flu + cost increase → S left).

Gap to Level 3: Written analysis needs signal words and more explicit causal linkage: "...so consumers substitute away from beef and pork toward chicken, increasing the quantity demanded at every price and shifting D rightward."

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#LEVEL 3 (6/6)

[Diagram: Y-axis "Price of chicken ($/kg)", X-axis "Quantity of chicken (kg)". S and D with original equilibrium Pe=$1.50, Qe. D shifts RIGHT to D1. S shifts LEFT to S1. Final equilibrium P1=$3.70, Q1 with dotted lines to both axes.]

"Chicken became a more popular choice as consumers increasingly regarded it as a healthier option compared to beef and pork.. shifting demand rightward from D to D1 as shown in the diagram. The price of chicken rising from $1.50/kg in May 2020 to $3.70/kg by May 2022 confirms the demand increase exceeded any quantity adjustment, as consumers extended purchases at higher prices. [K2 App1 An1 ✓]

The 20% rise in chicken feed costs and the bird flu outbreak that made 140 million chickens globally unfit for consumption simultaneously reduced the profitability and physical capacity of chicken supply.. shifting supply leftward from S to S1 in the diagram. With both demand rising and supply falling, the final equilibrium P1 ($3.70/kg) lies above the original Pe ($1.50/kg) and to the right of the original supply curve, confirming the demand factor dominated the price increase. [K2-final App2 An2 ✓]"

Why this is 6/6: Diagram with correct axes, both shifts on same diagram, final equilibrium with dotted lines ✓. Demand mechanism explicit (healthier option → substitution → D right) ✓. Supply mechanism explicit (feed costs + bird flu → supply falls → S left) ✓. Both figures embedded ($1.50→$3.70, 20%, 140m chickens) ✓. No evaluation anywhere. Hard stop at An2.

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#PART 6 — DIAGNOSE YOUR 6-MARK ANALYSE

The specific missing element — not a category. "Needs more analysis" is useless. "Missing Stage 4: WHO + WHAT + WELFARE in one sentence" is the diagnosis.

ATTEMPT 1: "Demand increased because chicken is popular. Supply decreased because of bird flu. Price went up."

Level: L1. No diagram. No figures. No mechanism. No chain. "Demand increased" + "supply decreased" = identifying direction only, no causal explanation.

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ATTEMPT 2: "Demand increased because chicken became a more popular choice. Supply fell due to bird flu and higher costs. The price of chicken rose by 147%."

Level: Low L2. Direction correct. Figure present (147%) but not embedded in mechanism. No diagram. "Became more popular" = one-stage chain at best.

Upgrade: Draw diagram. Replace "became more popular" with "became a healthier alternative to beef and pork, causing consumers to substitute toward chicken and shifting demand rightward." Embed "$1.50 to $3.70/kg" inside the supply mechanism.

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ATTEMPT 3: [Diagram: D shifts right, S shifts left, but drawn on SEPARATE diagrams]

"Demand rose as chicken was seen as healthier, shifting D right from $1.50/kg. Supply fell due to 20% higher feed costs and 140 million bird flu chickens, shifting S left to $3.70/kg."

Level: L2 upper (4–5/6). Both shifts correct direction ✓. Figures embedded ✓. An marks partially awarded. Gap: Shifts on separate diagrams = K2 (final equilibrium) not awarded. Written "shifting S left to $3.70/kg" doesn't make sense (the supply shift doesn't equal the final price directly).

Upgrade: Redraw both shifts on same diagram. Write "with both curves shifted, the combined effect produces final equilibrium P1 = $3.70/kg as shown in the diagram."

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ATTEMPT 4 (6/6): As in Part 5 Level 3 above.

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#PART 7 — ALL CONFIRMED Q12c PRICE-CHANGE QUESTIONS: DATA READY

Memorising these figures means App marks are automatic.

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#PART 5B — WRONG VS RIGHT: THE THREE MOST COMMON 6-MARK ERRORS

ERROR 1 — Evaluation written on a 6-mark question

WRONG: "However, the effectiveness of the demand increase depends on price elasticity. If supply is inelastic the price rise will be larger." → Zero AO4 marks. "The 6 mark questions do not require evaluation — avoid assessing the analysis points made." — Oct 2021 WEC11 Examiner Report (equivalent series). 60–90 seconds wasted.

RIGHT: Reach An2 (Stage 4 — named mechanism + final equilibrium stated). Stop. No "however." No "it depends." Hard stop.

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ERROR 2 — Two separate diagrams instead of one

WRONG: Student draws "Diagram 1: Demand shifts right" and "Diagram 2: Supply shifts left" as two separate diagrams. → K2 (final equilibrium) mark lost automatically. "A significant number drew shifts on separate diagrams meaning the final equilibrium was not awarded." — Multiple WEC11 series.

RIGHT: ONE diagram. D shifts RIGHT to D1. S shifts LEFT to S1. Both on same set of axes. New equilibrium P1/Q1 with dotted lines from BOTH new curves.

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ERROR 3 — Data stated beside the argument instead of embedded

WRONG: "Cotton prices rose from $0.54 to $0.80/lb. This was because demand increased for healthcare goods and supply fell due to the Pakistan crop failure." → Data is beside the argument. Remove the data: the argument still makes the same generic point. Zero AO2.

RIGHT: "With global cotton demand surging for healthcare masks and surgical gowns. confirmed by the price rising from $0.54 to $0.80/lb between April 2020 and January 2021. — the demand curve shifted rightward from D to D1 as shown in the diagram, while simultaneously the Pakistan crop failure shifted supply leftward from S to S1, producing the final equilibrium P1 above the original Pe." → Data embedded inside the causal mechanism. Remove it: the argument loses precision. AO2 earned.

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#PART 8 — THE EXAM-DAY SYSTEM: 8 MINUTES

╔══════════════════════════════════════════════════════╗
║  STEP 1 — CHECK MARK ALLOCATION (5 seconds)          ║
║  6 marks → this document applies                    ║
║  8 marks → use FORGE · THE 8-MARK SYSTEM            ║
╠══════════════════════════════════════════════════════╣
║  STEP 2 — IDENTIFY REASONS (30 seconds)              ║
║  One demand reason from extract                     ║
║  One supply reason from extract                     ║
║  Price went UP or DOWN? → determines shift direction ║
╠══════════════════════════════════════════════════════╣
║  STEP 3 — DRAW DIAGRAM (2 minutes)                   ║
║  Both shifts on SAME diagram                        ║
║  Y: "Price of [commodity]"                          ║
║  X: "Quantity of [commodity]"                       ║
║  Original equilibrium: Pe, Qe + dotted lines        ║
║  D shift with label D1                              ║
║  S shift with label S1                              ║
║  Final equilibrium P1, Q1 + dotted lines            ║
╠══════════════════════════════════════════════════════╣
║  STEP 4 — WRITE (5 minutes)                          ║
║  Sentence 1: Demand reason + mechanism (signal word) ║
║  Sentence 2: Extract figure embedded                 ║
║  Sentence 3: Supply reason + mechanism               ║
║  Sentence 4: Extract figure embedded                 ║
║  Sentence 5: "Combined effect: final equilibrium     ║
║               P1 as shown in the diagram."          ║
╠══════════════════════════════════════════════════════╣
║  STEP 5 — HARD STOP                                  ║
║  No "However". No evaluation. Stop. ║
║  Move to next question immediately. ║
╚══════════════════════════════════════════════════════╝

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#REFERENCE CARD — MEMORISE

DIAGRAM RULE: Both shifts on SAME diagram.
              Separate diagrams = K2 (final equilibrium) lost.

MARK RULE:    K2 = diagram. App2 = figures. An2 = mechanisms.
              Zero evaluation. Hard stop at An2.

SHIFT RULE:   Price UP → D right AND/OR S left.
              Price DOWN → D left AND/OR S right.
              Always check price direction first.

FIVE MOST TESTED DATA POINTS:
1. Oil: $68 → $32 (2020 COVID)
2. Cotton: $0.54 → $0.80/lb (Apr 2020–Jan 2021)
3. Chicken: $1.50 → $3.70/kg (+147%, May 2020–May 2022)
4. Semiconductors: +20% (2022, demand surge + cost rise)
5. Cocoa: +68% (Nov 2022–Nov 2023)
EMERGENCY (5 min left): Write "only if [condition]" NOW. Eval before chains.

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→ Also read: FORGE · 4-Mark System | FORGE · Section C Blueprint | CODEX · Application Bank | CODEX · Question Vault

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VERIDIAN WEC11 · FORGE SERIES · THE 6-MARK SYSTEM