Last spring, Zhang Bin, a senior researcher at the Chinese Academy of Social Science, proposed a one-time appreciation, followed by a return to a pegged exchange rate.

去年春季，中国社会科学院高级研究员张斌提出了一次性升值、然后回到与一篮子货币挂钩的汇率建议。

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Its economic internal rate of return is 13.41%, larger than its social discount rate 12%, therefore, the project is economically rational.

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。

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Wayne Counts concluded in a 2008 paper, the overall rate of return for Social Security contributions is a mere 1.8%, and for many workers in higher income levels, the return is actually negative.

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Unlike traditional bonds, SIBs do not have a fixed rate of return as financial return depends on the achievement of specific social outcomes set at the start of the bond issue.

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Similarly, in Galveston, Texas, where local government workers in three counties opted for a personal savings and investment alternative to Social Security in 1981 as well, the annual rate of return fell by about half at the lowest point of the financial crisis.

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