企业最优资本结构是指使企业平均资本成本最低且企业价值最大的债务资本和权益资本的比例关系。
The optimum capital structure is the ratio of long-term liabilities to equities when the average cost of capital is lowest and the value of enterprise is max.
然而，如果市场结构是内生的，由于资本流入导致新企业进入市场，从而提高了企业的平均成本，这样，资本流入反而会有贫困化效应。
However, if the market structure is endogenous, then a capital inflow tends to be immiserizing because it increases entry and lets firms increase their average cost.
企业在生产经营中，应该运用适当的方法确定最佳资本结构，使企业的平均资本成本最低，企业价值最大。
Enterprise should make sure of the best structure of capital through a suitable measurement, thus to minimize the cost of capital and maximize its business value.
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