ECON301: ace the component, not just read the notes
Your complete guide to University of Wisconsin-Madison's intermediate microeconomic theory course. See where the marks are, work real practice questions, and study with an AI tutor that knows ECON301.
Sia generates ECON301 practice questions, walks through consumer preferences and constrained optimisation step by step, and quizzes you on the material the component that weights most heavily.
Worked example
A consumer has utility U = x*y, faces prices px = 2 and py = 5, and has income 100. How much × does she buy at the optimum?
For Cobb-Douglas utility U = x*y with equal exponents, the optimum splits income evenly between the two goods.
Quantity of × is spending divided by price: 50 / 2 = 25.
Check the tangency condition: MRS = y/x must equal px/py = 2/5. With × = 25 and y = 50/5 = 10, y/x = 10/25 = 0.4 = 2/5, which confirms it.
The trap: Dividing total income by the price of x, giving 50, which is what you would buy if you spent everything on one good. The budget constraint binds, but so does the tangency condition, and a solution that satisfies only one of the two is not an optimum. Checking MRS against the price ratio at the end catches this every time. classic slip!
Overview
What ECON301 is, and where it sits
ECON 301 is UW-Madison's intermediate microeconomics: contemporary theory of consumption, production, pricing and resource allocation, at 4 credits and intermediate level.
The difference from ECON 101 is method rather than subject. Where the introduction applies models, this course derives them. Its published outcomes ask students to apply economic models to household and firm behaviour, to specify and adapt microeconomic models for particular environments, to solve decision problems using mathematical optimisation, and to understand these models as the foundation for more advanced analysis. The third of those is the one that changes how the course feels week to week.
That is why the requisite structure matters: alongside an introductory economics course you need calculus or the department's own quantitative tools course. ECON 311 is the advanced-treatment alternative, taken with MATH 222, and the two preclude each other.
Always treat your own course outline and the exam timetable as authoritative.
Difficulty & time commitment
Is ECON301 hard, and how much time does it take?
ECON301 is manageable if you keep a weekly rhythm and treat the back half as the main event. The pattern is consistent: it starts gently and steepens, and the heaviest assessment is the part that separates grades.
The difficulty curve and the assessment weighting point the same way: the back half is harder and worth more. Front-loading effort there is the highest-return decision in the course.
Is this course for you
Who tends to do well, and who tends to struggle
You will likely do well if
- Your calculus is current, not merely completed.
- You can set a problem up before solving it, since setup is where most marks sit.
- You check an optimum against both the constraint and the tangency condition.
- You are willing to adapt a model rather than pattern-match to a memorised one.
You may struggle if
- You met the calculus requisite years ago and have not used it since.
- You learned ECON 101 as vocabulary rather than as models.
- You avoid the derivations and revise from summary results.
- You expect the intuition to carry you; here it checks the algebra rather than replacing it.
- Solve every optimisation twice, once by substitution and once by the tangency condition, until they agree instantly.
- Keep a list of the standard functional forms and what each implies about behaviour.
- After every result, state what it means in words; the interpretation is examined alongside the algebra.
- Practise adapting a model to an unfamiliar setting, which is a stated outcome and a common exam device.
Syllabus
The 8 topics, topic by topic
The exam-weight marker on each topic shows where the marks concentrate. The amber topics carry the highest exam weight.
T1 · Consumer preferences and utility
Course descriptionRepresenting choice formally, which is the groundwork for every optimisation that follows.
T2 · Constrained optimisation and demand
Learning outcome 3Deriving demand by maximising subject to a budget constraint. The technical heart of the first half.
T3 · Comparative statics of consumer choice
Learning outcome 2How the optimum moves when prices or income change, decomposed into its parts.
T4 · Production technology
Course descriptionHow inputs become output, and what the technology implies about the firm's choices.
T5 · Cost minimisation and cost curves
Course descriptionThe firm's dual problem: producing a given output as cheaply as possible, and what that generates.
T6 · Pricing under competition and market power
Course descriptionOutput and price decisions across market structures, derived rather than asserted.
T7 · Resource allocation and efficiency
Course descriptionWhether the allocation a market reaches is efficient, and in what sense.
T8 · Adapting models to new environments
Learning outcome 2A stated outcome in its own right: modifying a standard model to fit a situation it was not written for.
How it's assessed
Assessment structure
A component-by-component weighting breakdown is not published for this course. Rather than estimate one, we publish only what the course itself states. Check your current course outline for the exact percentages.
No component weighting is published. The university catalogue publishes course description, credits, requisites, course designation and learning outcomes, but not assessment weights, and instructor syllabi carrying them are set per section and per term. Rather than estimate a breakdown or reuse a superseded one, none is asserted here. Check the syllabus your instructor posts for this term. Not published in the catalogue. Format is set per section by the instructor.
How to actually pass it
A weekly rhythm, two checklists, and the traps to avoid
The course rewards consistency over cramming, and practice over re-reading. Here is the loop that works, then what to have nailed before each exam.
The weekly loop
Before the mid-semester checklist
- Preferences, utility and their representation
- Budget constraints and constrained optimisation
- Demand derived from the consumer's problem
- Comparative statics, decomposed
Before the final heaviest topics
- Production technology and its implications
- Cost minimisation and the resulting cost curves
- Pricing under competition and under market power
- Efficiency and resource allocation
- Adapting a standard model to a new environment
The mistakes that cost marks
Satisfying the constraint but not the tangency condition. An optimum needs both. Solutions that spend the whole budget on one good are the classic symptom.
Memorising results for one functional form. Exams change the form deliberately, which is why the derivation matters more than the answer.
Skipping interpretation. An algebraically correct answer with no economic reading is an incomplete answer at intermediate level.
Treating the requisite calculus as a formality. It is used from the first weeks and it is not re-taught.
Formula & concept sheet
The vocabulary and formulas you must own
- Utility function
- A representation of preferences that allows choice to be analysed formally.
- Budget constraint
- The set of bundles affordable at given prices and income.
- Constrained optimisation
- Maximising an objective subject to a constraint; the course's central technique.
- Marginal rate of substitution
- The rate at which a consumer will trade one good for another, equal at an optimum to the price ratio.
- Comparative statics
- How the optimum changes when a parameter changes.
- Production function
- The relationship between inputs and maximum attainable output.
- Cost minimisation
- Choosing inputs to produce a given output as cheaply as possible.
- Market power
- The ability to price above marginal cost, and the source of allocative inefficiency.
- Resource allocation
- How scarce inputs and outputs are distributed across uses, and whether that allocation is efficient.
Common acronyms: {'term': 'MRS', 'def': 'Marginal rate of substitution'} · {'term': 'MC', 'def': 'Marginal cost'} · {'term': 'L&S', 'def': 'College of Letters & Science'} · {'term': 'GenEd', 'def': 'General education requirement'}.
Where it fits
Prerequisites, related courses & why it matters
Requires an introductory economics course (ECON 101, 111, A A E 101, or 215 prior to Fall 2024) and a quantitative requisite (MATH 213, 217, 221, ECON 205, or MATH 211 prior to Fall 2024). Not open to students with credit for ECON 311.
Your ECON301 study toolkit
Study the course with Sia, not just read about it
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FAQ
Frequently asked questions
How is ECON 301 different from ECON 101?
Method. ECON 101 applies models; ECON 301 derives and solves them, and one of its published outcomes is solving decision problems using mathematical optimisation.
What are the requisites?
An introductory economics course plus a quantitative requisite: MATH 213, 217, 221, ECON 205, or MATH 211 prior to Fall 2024.
Should I take ECON 301 or ECON 311?
ECON 311 is the advanced mathematical treatment, requiring MATH 222. Credit in either closes the other, so choose according to your mathematics background and intended path.
How much calculus is used?
Enough that the requisite is not a formality. Constrained optimisation appears early and recurs throughout.
How is it graded?
No weighting is published. Assessment is set per section, so use your instructor's syllabus.
Is it still running?
Yes. The catalogue records it as last taught in Summer 2026.
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