ECO2150 · Module 6 · Interpreting Economic Models
Status: Retrospective (documented post-build) Program: BBA Degree level: Undergrad Documented by: Claude Code Date: 2026-04-24
Module 6 is the synthesis capstone of ECO2150. It requires learners to apply the full microeconomics toolkit — algebraic equilibrium solving, welfare area calculation, tax incidence analysis, and government intervention evaluation — to a single coherent policy scenario. The module's designated CLO (CLO-6: interpret economic models, L4 Analyze) is operationalized by having learners derive exact numerical answers, critically evaluate a flawed policy visualization, and then interpret the market failure and allocative efficiency implications of the excise tax model.
| CLO | Text | Pillar mapping |
|---|---|---|
| CLO-1 | Articulate key microeconomic concepts (scarcity, opportunity cost, supply and demand, elasticity, MR/MC, profit) | Domain |
| CLO-3 | Employ graphical tools and economic reasoning to determine equilibrium | Domain |
| CLO-4 | Analyze potential benefits and drawbacks of government interventions | Domain + Reasoning (CLO-4 formula) |
| CLO-5 | Construct well-reasoned arguments from microeconomic theory | Contribution |
| CLO-6 | Interpret simple economic models of market equilibrium and behavior | Reasoning |
Note: CLO-2 (apply principles to real-world scenarios) and CLO-5 (construct arguments) are addressed at L3–L4 through the interpretation step; CLO-5 is not independently scaffolded in this assessment.
Status: Retrospective draft — generated by Nexus based on module learning intent and CLO mappings. Requires LXD review and sign-off before these descriptors are wired into the grading prompt (#28).
| Rating | Descriptor |
|---|---|
| Meets Expectations (90–100%) | Correctly solves for equilibrium price and quantity within defined tolerances (P: ±$0.01; Q: ±2 thousand bottles); accurately calculates consumer surplus, producer surplus, and deadweight loss using the correct welfare area formulas; correctly identifies the $0.30/$0.30 tax incidence split with algebraic justification referencing equal supply and demand slopes (CLO-1, CLO-3). |
| Mostly Meets (80–89%) | Equilibrium calculation correct within tolerance; at least two of three welfare areas (CS, PS, DWL) calculated correctly; incidence split identified correctly but algebraic derivation contains a minor arithmetic error that does not indicate a conceptual misunderstanding. |
| Somewhat Meets (70–79%) | Equilibrium calculation contains an error that propagates to welfare areas; at least one welfare area calculated correctly; tax incidence analysis attempted but the split is incorrect or the reasoning is circular. |
| Does Not Meet (<70%) | Unable to solve for equilibrium or equilibrium answer is outside tolerance with no correct method shown; welfare area calculations absent or fundamentally incorrect (e.g., wrong geometric formula); tax incidence analysis absent. |
| Rating | Descriptor |
|---|---|
| Meets Expectations (90–100%) | Policy interpretation correctly connects the welfare calculations to the allocative efficiency implications of the Hartwell City excise tax; explains the government intervention trade-off (revenue generated vs. deadweight loss) with reference to the specific calculated figures; identifies the equity implication of the symmetric incidence split for consumers and producers (CLO-4, CLO-6). |
| Mostly Meets (80–89%) | Policy interpretation mostly correct; connects welfare findings to allocative efficiency but misses one key implication (e.g., does not address the government revenue effect or the equity dimension of the symmetric split). |
| Somewhat Meets (70–79%) | Policy interpretation is directionally correct but superficial — names the welfare effects without explaining their significance to the Hartwell City government's decision; no reference to the specific calculated figures. |
| Does Not Meet (<70%) | Policy interpretation absent or incorrect; cannot connect welfare calculations to government intervention evaluation; analysis restates the scenario without interpretation. |
| Rating | Descriptor |
|---|---|
| Meets Expectations (90–100%) | Constructs an independent argument about the policy's net effect that goes beyond restating the welfare area calculations — e.g., identifies a distributional concern, an elasticity-related implication not made explicit in the scenario, or a comparison to an alternative instrument (e.g., subsidy); argument is grounded in the specific Hartwell City data (CLO-5). |
| Mostly Meets (80–89%) | Some independent framing present; argument goes slightly beyond restating the model outputs but relies on the scenario's framing for structure. |
| Somewhat Meets (70–79%) | Written response restates the scenario's conclusions without constructing an independent argument; no original analytical position taken; policy evaluation is descriptive. |
| Does Not Meet (<70%) | No independent argument constructed; response is a transcript of the quantitative steps without interpretive synthesis; no policy position or evaluative claim. |
These descriptors were drafted retrospectively by Nexus (Claude Code) on 2026-04-27 based on existing CLOs and scenario content. They require LXD review and approval before being wired into the grading prompt (punch list #28).
| Role | Name | Date | Status |
|---|---|---|---|
| LXD (review & approve) | Fadl | Approved | |
| Head of LD (final approval) | Pending |
Once approved, update Status above to "Approved" and add the approver names and dates here. Changes after approval require a new sign-off round and a version bump on the PRD.