In: Economics
If there is a positive externality, use a diagram to explain why there may be no efficiency loss due to the insurance price subsidy.
A positive externality imposes a benefit on a large sphere of people beyond those associated with the transaction. When there is a positive externality in the market for a good, private benefit is always less than social benefit so that private outcome is a socially inefficeint one. Hence to produce more the marginal social benefit should be equated against marginal cost.