Pls describe the “Optimal output for a good with positive externalities” by plotting necessary graphics
The followng graph represents positive externality. Q is the market quntity produced, but Q* is the socially optimum quantity. That means, the socitety will gain more if Q* amount is produced. Thus the less than optimum quantity has resulted in welfare loss, represented by the shaded traingle between Q and Q* above the marginal cost curve.
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