The foreign element that can exist either production or consumption of the goods or services. In the presence of foreign elements dissipates, a natural first response to improve the allocation of resources is the price adjusted. The official model supports this policy recommendations showed the ability to achieve a Pareto optimal allocation by currency surcharges to overcome in terms of competition. When income reaches a certain level, people can have the freedom to dispose of wealth to achieve Pareto-efficient allocation, otherwise the allocation results will be ineffective.
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