V2EX marginal rate

Marginal Rate

Definition / 定义

marginal rate边际税率/边际费率,指“在某个区间内,新增的一单位收入或新增的一单位活动所适用的那一档税率(或费率)”。在税收语境中最常见,通常指新增一元收入所适用的税率(不同于平均税率)。也可在经济学中泛指“边际上的比率”。

Pronunciation / 发音

/mrdnl ret/

Examples / 例句

My marginal rate is 24%.
我的边际税率是24%。

Because her marginal rate rises in the next bracket, she’ll owe more tax on the extra bonus even though her overall average rate may not change much.
因为她在下一档的边际税率更高,所以额外奖金部分会缴更多税,尽管她的整体平均税率可能变化不大。

Etymology / 词源

marginal 源自拉丁语 margo, marginis(“边缘、界限”),引申为“边际的、临界处的”;rate 来自拉丁语 rata(“固定、计算出的比例”)并经由中古法语发展为“比率/费率”。合起来强调“发生在边际(新增部分)上的比率”。

Related Words / 相关词

Literary Works / 文学作品

  • Principles of Economics(N. Gregory Mankiw)中常用“marginal tax rate”等表述讨论税收激励与劳动供给。
  • Economics(Paul A. Samuelson & William D. Nordhaus)在公共财政/税收章节中使用“marginal rate”解释边际激励效应。
  • Capital in the Twenty-First Century(Thomas Piketty)讨论所得分配与税制时频繁涉及(尤其是“marginal tax rate”)这一概念。
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