The internal rate of return represents the true interest rate earned in an investment over its economic life.

内含报酬率是项目在其寿命周期内所实现的真实收益率。

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For example, the interest rate earned by the notional accounts is set by the growth of average wages, not that of the total pay bill, which means that it is unaffected by fertility-induced falls in employment.

ECONOMIST: State pension systems that mimic private accounts

The 0.9% surtax brings the Medicare rate on earned income to the same 3.8% as on unearned income.

FORBES: IRS Should Fix Net Investment Tax Proposed Regulations

This was set at 18% in 2007, far below a top tax rate on earned income of 43%.

ECONOMIST: Spain's growing budget deficit