Journal of Economic Perspectives · 2025 · Kirill Borusyak、Peter Hull、Xavier Jaravel
中文摘要
近期的计量经济学文献表明, 利用移动份额工具变量进行识别存在两条不同的路径: 或依托众多外生变动（shifts）, 或依托外生份额。我们通过简明的核查清单呈现这两条路径的核心逻辑与实践要点, 并以多种实证情境阐明关键要点。
Abstract
A recent econometric literature shows two distinct paths for identification with shift-share instruments, leveraging either many exogenous shifts or exogenous shares. We present the core logic of both paths and practical takeaways via simple checklists. A variety of empirical settings illustrate key points.