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1.1.6 Externalities

Syllabus
2026
Topic
1.1.6
Level

1.1.6.a External costs

Definition of external costs.

1.1.6.b Examples of external costs

Give and explain examples of external costs, including pollution, congestion and environmental damage.

1.1.6.c External benefits

Definition of external benefits.

1.1.6.d Examples of external benefits

Examples of external benefits, including education, healthcare and vaccinations.

1.1.6.e Social cost and social benefit formulae

Definition and formula for:

  • social costs = private costs + external costs
  • social benefits = private benefits + external benefits.

Objective notes

5 learning objectives
ConceptIGCSE Economics