ECX5001 Economics of environment and sustainability
The Complete Study & Assessment Guide · S2 2026ECX5001 Overview
- Monash University
- Semester 2, 2026
- Postgraduate unit
- Block mode
ECX5001 Economics of environment and sustainability is a postgraduate Monash University unit taught in an intensive block. The subject uses economic reasoning to diagnose environmental problems, compare policies and evaluate empirical evidence.
- Assessment Exercise 35%, Quiz / Test 40%, Presentation 25%.
- Quiz method Name the economic margin before comparing policy tools.
- Evidence rule Scale each conclusion to the comparison the study supports.
- Project close Finish with a feasible improvement and its distributional effect.
How ECX5001 is assessed
| Component | Weight | Format |
|---|---|---|
| 1 - Exercise | 35% | Participation 5% in all classes plus Homework 30% across the block. Check exact task dates and submission settings in Moodle. |
| 2 - Quiz / Test | 40% | Two individual, one-hour in-class quizzes in weeks 3 and 6. |
| 3 - Presentation | 25% | Research Project presentation in week 8, completed in a group of up to 6. |
The handbook weights total 100%. The LMS disaggregates the 35% Exercise into 5% Participation and 30% Homework. No component is flagged as a hurdle in the fetched handbook record; verify any broader progression rule in the current handbook.
Current ECX5001 dates
| Date | Item | Control |
|---|---|---|
| Week 3 | Quiz 1 | During class |
| Week 6 | Quiz 2 | During class |
| Week 8 | Research Project presentation | Confirm group and submission settings in Moodle |
Dates are as published in the Semester 2, 2026 unit schedule. Confirm exact deadlines and submission settings in the live LMS.
What ECX5001 covers
Follow the six taught topics from economic foundations and valuation to pollution control, climate policy, environmental justice and sustainable development.
Economic Foundations and Collective Action
Week 1: efficiency, property rights, market failure, externalities, public goods, information and incentives.Economic foundations turn a broad environmental concern into a decision problem. Begin with scarcity and opportunity cost, then identify any external effect, public-good benefit, common-resource pressure or information problem.
- Scarcity, opportunity cost and efficiency
- Private costs and social effects
- Externalities and public goods
- Common resources and free riding
- Property rights and transaction costs
- Collective action across jurisdictions
Cost-Benefit Analysis and Environmental Valuation
Week 2: counterfactuals, incremental effects, discounting, stated preference and revealed preference valuation.Cost-benefit analysis compares incremental social benefits and costs against a credible without-policy baseline.
- The without-policy baseline
- Incremental social effects
- Standing and distribution
- Present value and discounting
- Revealed preference valuation
- Stated preference and benefit transfer
Pollution Taxes and Tradable Permits
Weeks 2 and 3: Pigouvian taxes, cap-and-trade, marginal abatement cost, monitoring and allowance design.Pollution taxes and tradable permits use a common idea: create a marginal consequence for emissions so low-cost abatement is undertaken first. A tax fixes the emissions price while quantity responds.
- Pigouvian pricing
- Price versus quantity
- Marginal abatement cost
- Cost-effective allocation
- Monitoring and compliance
- Banking, offsets and allocation
Air Pollution Policy and Empirical Evidence
Weeks 3 and 4: stationary pollution, regulatory design, compliance, counterfactual evidence and exposure.Air-pollution policy becomes an empirical chain from legal rule to compliance, emissions, ambient concentration, exposure and valued outcomes. Every arrow can fail, and a policy date alone does not create a counterfactual.
- Stationary-source regulation
- Compliance behaviour
- Emissions and concentration
- Counterfactual comparison
- Monitoring and exposure
- Causal and welfare claims
Climate Change Economics and Policy
Week 5: climate-economy links, impact estimation, mitigation, adaptation, discounting and uncertainty.Climate change economics connects emissions and carbon stocks to changing climate distributions, exposure, economic response and adaptation. Global mean temperature is a useful summary but not the entire climate system.
- Climate distributions and energy balance
- Emissions stocks and global externalities
- Climate-response estimation
- Damage projection and adaptation
- Mitigation and carbon pricing
- Uncertainty and option value
Environmental Justice and Sustainable Development
Week 6: unequal burdens, constrained choice, energy efficiency, natural resources and implementation.Environmental justice and sustainable development ask who bears environmental harm, who receives policy benefits, who pays and who can influence decisions.
- Distribution of exposure
- Willingness to pay and constraints
- Energy-efficiency gaps
- Political economy and voice
- Natural-resource revenue
- Just transition and implementation
Its six teaching topics move from efficiency, property rights, externalities and public goods through cost-benefit analysis and environmental valuation, pollution taxes and tradable permits, air-pollution policy, climate change, environmental justice and sustainable development.
The published assessment has no final examination component.
The 2026 Monash handbook groups the work as 1 - Exercise, 35%, 2 - Quiz / Test, 40% and 3 - Presentation, 25%. The LMS explains that Exercise comprises Participation at 5% and Homework at 30%, while Presentation appears as the Research Project.
The two quizzes run during class in weeks 3 and 6, and the research presentation sits in week 8. Exact task settings belong in Moodle.
The course rewards a connected argument. Define the environmental outcome, identify the incentive or institutional mechanism, explain how the proposed policy changes behaviour, inspect the evidence and then make a specific improvement.
Distribution is part of the analysis: ask who is exposed, who pays, who receives benefits and who can participate. The guide provides original examples and practice questions. It does not reproduce a past paper, quiz or rubric because none was present in the captured materials.
Worked example · free
Choose abatement at the lowest marginal cost
- +1List every marginal unit separately: $10 and $22 for Plant A, $14 and $19 for Plant B, $8 and $28 for Plant C.
- +1Rank the available units from cheapest: $8, $10, $14, $19, $22, $28.
- +1Choose the first four units: C1, A1, B1 and B2.
- +1Add costs: 8 + 10 + 14 + 19 = $51.
- +1Explain that trading moves abatement toward low-cost sources and tends to equalise marginal abatement costs, subject to monitoring and transaction constraints.
Key terms
- Externality
- An effect of one actor's choice on others that is not fully reflected in the actor's private decision. The policy question is which margin carries the unpriced effect.
- Public good
- A good or service that is non-rival over the relevant range and difficult to exclude non-payers from using. Free riding can lead to under-provision.
- Counterfactual
- The outcome that would have occurred without the policy or project. It is unobserved and must be approximated with a defensible comparison or model.
- Marginal abatement cost
- The additional cost of reducing one more unit of pollution. Cost-effective allocation pushes this cost toward equality across covered sources.
- Tradable permit
- A transferable allowance tied to a defined emissions obligation. The cap sets aggregate quantity while exchange discovers an allowance price.
- Benefit transfer
- Applying a valuation estimate from an existing study to a new policy setting after checking comparability of the population, environmental change and context.
- Environmental justice
- Analysis of how environmental harms, benefits, policy costs and decision power are distributed across groups and places.
- Resource curse
- The observed underperformance of some resource-rich economies, directing attention to volatility, institutions, revenue capture and the conversion of natural wealth into durable assets.
ECX5001 FAQ
How is the unit assessed?
The 2026 handbook lists Exercise at 35%, Quiz / Test at 40% and Presentation at 25%. The LMS breaks Exercise into Participation at 5% and Homework at 30%, and labels the Presentation as the Research Project. Together the handbook rows total 100%.
When are the quizzes held?
The unit schedule places Quiz 1 during class in week 3 and Quiz 2 during class in week 6, with each quiz described as one hour in the assessment table. Confirm room, permitted materials and detailed coverage in the current Moodle announcement.
What belongs in a cost-benefit analysis?
Start with a credible without-policy baseline and count incremental social effects. State standing, value effects with methods suited to the environmental service, discount dated flows consistently, report distribution and show which assumptions switch the recommendation.
How do pollution taxes differ from tradable permits?
A pollution tax fixes the marginal emissions price and lets total quantity respond. A permit system fixes the allowance quantity and lets price respond. Both depend on coverage, measurement, compliance and the behavioural margin they regulate.
How should I evaluate an empirical policy claim?
Identify the treatment, comparison, outcome, population and period. Test targeting, trends, spillovers, measurement and composition. Then keep descriptive, causal, mechanism and welfare claims separate so the conclusion does not outrun the design.
How should the research project be structured?
Define the environmental outcome, diagnose the economic mechanism, explain the policy instrument, synthesise the strongest evidence, identify a specific weakness and propose an implementable improvement. End by showing distribution, monitoring and the condition that would trigger revision.
Questions students ask in each ECX5001 chapter
- Is every environmental problem a market failure?
- No. Scarcity and disagreement can exist even when relevant costs are priced and rights are clear. Call something a market failure only after identifying the omitted social effect, public-good financing problem, information asymmetry or institutional defect that separates private choice from the social outcome. Chapter 01 · Economic Foundations and Collective Action
- Why is the baseline so important?
- Benefits and costs are changes relative to what would otherwise happen. If technology, traffic or environmental quality would improve without the project, treating today's condition as fixed credits the intervention for unrelated progress and can reverse the ranking. Chapter 02 · Cost-Benefit Analysis and Environmental Valuation
- Why can trading reduce compliance cost?
- Sources compare the allowance price with their next unit of abatement. Low-cost sources reduce more and sell or avoid buying allowances, while high-cost sources buy. Exchange tends to equalise marginal abatement costs when monitoring, compliance and transaction conditions support the market. Chapter 03 · Pollution Taxes and Tradable Permits
- Why is a before-and-after comparison weak?
- It combines the policy effect with common trends, weather, technology, fuel prices and composition changes. A credible analysis needs a comparison that represents the treated outcome without policy and tests whether treatment changes measurement or location. Chapter 04 · Air Pollution Policy and Empirical Evidence
- Why is climate change a global externality?
- Greenhouse-gas emissions accumulate in a shared atmosphere, and many benefits of mitigation are non-excludable across borders. Current jurisdictions can bear concentrated costs while benefits are dispersed across places and future periods, creating incentives to free ride. Chapter 05 · Climate Change Economics and Policy
- Does low willingness to pay mean low environmental value?
- Not necessarily. Observed willingness to pay is constrained by income, credit, information, rights and available choices. A household can face high environmental harm yet lack the means or authority to purchase an improvement. Chapter 06 · Environmental Justice and Sustainable Development
How to prepare for the assessments
Use one claim ledger for the whole block. For every topic, write the environmental outcome, actor, private margin, effect on others, policy instrument, empirical comparison, uncertainty and distributional consequence. Before each workshop, review the chapter map; afterwards, redo the worked method and two practice cards without looking.
For quizzes, follow the published week boundary and practise short conditional conclusions rather than memorised slogans. For the project, build the evidence chain early and keep exact task settings in Moodle. When a result changes under a plausible assumption, report the switching condition and explain what evidence would resolve it.
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