aimnova.
DashboardMy LearningStudy Plan

Stay in the loop

Study tips, product updates, and early access to new features.

aimnova.

AI-powered IB study platform with personalised plans, instant feedback, and examiner-style marking.

IB Subjects

  • IB Diploma
  • All IB Subjects
  • IB ESS
  • IB Business Management
  • Grade Calculator
  • Exam Timetable 2026
  • ESS Predictions
  • BM Predictions

Study Resources

  • Free Study Notes
  • Revision Guide
  • Flashcards
  • ESS Question Bank
  • BM Question Bank
  • Mock Exams
  • Past Paper Feedback
  • Exam Skills
  • Command Terms

Company

  • Features
  • Pricing
  • About Us
  • Blog
  • Contact
  • Terms
  • Privacy
  • Cookies

© 2026 Aimnova. All rights reserved.

Made with 💜 for IB students worldwide

v0.1.317
NotesEconomicsTopic 2.8
Unit 2 · Microeconomics · Topic 2.8

IB Economics — Market failure: externalities and common pool resources

External costs/benefits, socially optimal outcomes, and policy responses.

Exam technique guidePractice questions

Key concepts in Market failure: externalities and common pool resources

Key Idea: Topic 2.8 explains why markets fail when there are external costs or benefits that are not reflected in the price. It covers negative externalities, positive externalities, and common pool resources.

✅ Core definitions

📉 Negative externalities

📈 Positive externalities

🌊 Common pool resources

Know the diagram labels: MPC, MSC, MPB, MSB. The gap between private and social curves = the externality. The welfare loss is ALWAYS a triangle.

What you'll learn in Topic 2.8

  • 2.8.1 Negative externalities
  • 2.8.2 Positive externalities
  • 2.8.3 Common pool resources
Suggested study order: Read the notes for each sub-topic below → test yourself with flashcards → attempt practice questions → review exam technique.

Study resources — 2.8 Market failure: externalities and common pool resources

2.8.1

Negative externalities

Notes
2.8.2

Positive externalities

Notes
2.8.3

Common pool resources

Notes

Ready to study Market failure: externalities and common pool resources?

Get AI-powered practice questions, personalised feedback, and a study planner tailored to your IB Economics exam date.

Start studying free

Topic 2.8 Market failure: externalities and common pool resources forms a core part of Unit 2: Microeconomics in IB Economics. Mastering these concepts will strengthen your understanding of connected topics across the syllabus and prepare you for exam questions that require analysis, evaluation, and real-world application.

Frequently asked questions

What does Topic 2.8 Market failure: externalities and common pool resources cover in IB Business Management?
Topic 2.8 covers market failure: externalities and common pool resources as part of the IB BM syllabus. Students learn key business concepts, tools, and frameworks that are assessed in Paper 1 (case study) and Paper 2 (structured questions).
How should I revise Market failure: externalities and common pool resources for IB Business Management exams?
Start with the micro-topic notes to build understanding, then use flashcards for key terms and formulas. Practise applying concepts to case study scenarios and review how marks are allocated in IB mark schemes.
Previous topic
2.7 Role of government in microeconomics
Next topic
2.9 Market failure: public goods
All Economics topics
Exam technique

Ready to practice?

Get AI-graded practice questions, mock exams, flashcards, and a personalised study plan — all aligned to your IB syllabus.

Start Studying Free

No credit card required · Cancel anytime