过去五年中，中国工业企业享受了创纪录的边际利润，因为收益增长超过了工资和原材料成本增长。

For the past five years, Chinese industrial firms have enjoyed record profit margins as revenue growth has outpaced the increase in wages and raw-material costs.

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从这一目标出发，引用企业追求利润最大化的生产模型来确定治理税收流失的最佳规模是治理税收流失的边际生产成本等于边际收益的那一点。

For this point, quoting from the production model of enterprise pursue profits maximize make sure the best size of controlling tax evasion, which is margin cost equal to margin return.

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At the margin, I'm reaping, I'm bearing the cost for the extra unit of effort I contribute, but I'm only reaping half of the induced profits of the firm, because of profit sharing.

从边际角度分析,我承担了多付出的全部边际成本,但我却只能得到一半的边际收益,因为利润是均分的

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