世界银行：构建可比较的全球贫困趋势（英文版）

Countries frequently revise how they measure income or consumption due to changes in data collection and questionnaire design. These changes create comparability breaks in poverty trends over time. This paper develops three methods to create global, regional, and country-level poverty trends that are comparable within countries over time. It does so by using national accounts growth to bridge non-comparable sequences. Accounting for comparability breaks creates large differences in some count