Respuesta :
When a positive externality exists the socially optimal level of output will be greater than that resulting from a private market.
The output level that takes into account all of the benefits and drawbacks of a transaction, or the equilibrium that would be reached if the results of the market took into account the impact of externalities.
"The ideal distribution of resources in society, taking into consideration all external costs and benefits as well as internal costs and advantages," is how economists define a "socially optimal solution."
The distribution that a charitable social planner chooses, limited solely by the endowment of resources, is the social optimum. In general, the social optimum will not be possible if the social planner's policy tools are constrained.
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