EquivalenceversusIndifference Scales
比较不同构成家庭的收入水平是福利指标和政策的核心问题。当前主流方法基于收入等价尺度，但存在理论、实证和规范困难。新提出的无差异尺度避免了多数问题，且可实证估计。本文主张放弃传统方法，转向新概念。
Comparing income levels across families with different composition is a central issue for most welfare indicators and policies. Currently, the dominant method relies on income‐based equivalence scales, which raise a host of theoretical, empirical and normative difficulties. However, a new approach, based on the notion of indifference scales, avoids most of these problems, while leading to empirically tractable estimation methods. I submit that time has come to abandon the traditional view in favour of the new concept.