而市场利率由于在偏好揭示、利率形成、风险报酬等方面的缺陷，又不能直接替代社会贴现率。
The market rate of interest can not directly substitute the social discount rate for its defect on preference revealing, interest forming, the reward of risk, etc.
该工程的经济内部收益率为13.41%，大于社会贴现率12%，所以该工程在经济上是合理的。
Its economic internal rate of return is 13.41%, larger than its social discount rate 12%, therefore, the project is economically rational.
从理论上说，这种贴现率代表着社会对现在消费的贴水。
Ideally, the discount rate represents the premium that the society puts on present consumption.
从理论上说，这种贴现率代表着社会对现在消费的贴水。
Ideally, the discount rate represents the premium that the society puts on present consumption.
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