Positive production externalities and examples

Positive production externalities arise when the actions of producers generate beneficial effects for third parties who are not directly involved in the transaction.

Examples of positive production externalities:

• Medical research - Developing treatments for diseases that benefit public health.
• Technological advancements - Innovations that create broader societal gains.
• Communication infrastructure - Building networks that enhance connectivity.

Government interventions for positive production externalities

Governments intervene to encourage more production when positive externalities exist.

Types of government interventions:

• Subsidies to producers - Financial support that reduces production costs.
• Provision of information - Supplying data on industry costs, pricing, and export markets, or running campaigns to raise awareness and boost demand.

Positive consumption externalities

Positive consumption externalities occur when an individual's consumption of a good or service creates advantageous effects for others who are not part of the original purchase.

Government interventions for positive consumption externalities

To address underconsumption, governments use various tools to increase demand.

Types of government interventions:

• Direct provision - Supplying goods or services at low or no cost.
• Subsidies to consumers - Reducing the price paid by buyers to encourage greater use.
• Legislation - Laws that mandate or promote consumption.
• Information campaigns - Educating the public on benefits to influence behaviour.
• Grants - Funding for individuals or groups to support consumption.

Economic analysis and real-world applications of interventions

Interventions for positive externalities aim to correct market failures by shifting curves to achieve allocative efficiency. This can promote greater equality.

Economic analysis of subsidies for positive production externalities

In a free market, equilibrium occurs where marginal private cost (MPC) equals demand, but marginal social cost (MSC) is lower than MPC, leading to under-allocation of resources.

A subsidy matching the external benefit shifts the supply curve rightwards, increasing output to the socially optimal quantity (Q*) and reducing price to P*, achieving allocative efficiency.

Economic analysis of subsidies for positive consumption externalities

Without intervention, equilibrium is at marginal private cost (MPC) equals marginal private benefit (MPB). However, marginal social benefit (MSB) = MPB + marginal external benefit (MEB), representing society's true demand.

A subsidy shifts the supply curve from S to S1, resulting in the optimal quantity Q* at a lower price P*.

Real-world applications of interventions

Distinguishing between externality types

To identify whether an externality is production- or consumption-related, consider the third party's position relative to the activity. Some scenarios may feature both types, such as education, which involves production (teaching) and consumption (learning) benefits.