Economics • Market Failure

Externalities & Interventions Simulator

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Shift the marginal social cost or benefit curve to model a negative or positive externality, then apply a tax or subsidy and see how the deadweight welfare loss changes — for Cambridge International AS/A Level Economics.

Market Equilibrium & Welfare

Externalities & Government Intervention Model
0 20 40 60 80 100 0 20 40 60 80 100 Quantity Price Pm Qm MPB (D) MPC (S1)
CS: Consumer Surplus
PS: Producer Surplus
Gov: Tax / Subsidy Impact
DWL: Welfare Loss

Economic Indicators

Metric Type Value
Market Price (Pc) Consumer $0
Producer Price (Pp) Producer $0
Market Quantity (Qm) Market Output 0 units
Consumer Surplus (CS) Welfare $0
Producer Surplus (PS) Welfare $0
Welfare Loss (DWL) Efficiency $0

Externalities & Interventions Simulator — Key Terms

Key concepts and translations across English, te reo Māori, Simplified Chinese (中文) and Korean (한국어).

EnglishTe reo Māori中文（简体）한국어What it means on this page

On the te reo Māori column. Terms marked as gaps have no attested equivalent in the sources checked — Karaitiana Taiuru's Dictionary of Māori Computer and Social Media Terms, Paekupu, the Reserve Bank's te reo financial glossary and Te Aka. No coinage is printed as though it were established; where a class needs one, commission it from Te Taura Whiri i te Reo Māori and credit the translator. Te reo Māori is not italicised and takes no plural "s".