The Trade-Off between Flexibility and Robustness in Instrumental Variables Analysis
中文摘要
在加性工具变量模型中，对工具有效性或加性可分性某些失效的稳健性，取决于对结果与处理之间结构关系所施加的先验限制的强度。本文对这一问题提供理论分析，讨论其对实证实践的启示，并通过一项基于真实世界数据校准的数值研究加以说明。（JEL C26, G51, H24, J13）
Abstract
In additive instrumental variables models, the robustness to some failure of instrumental validity or additive separability depends on the strength of a priori restrictions on the structural relationship between outcomes and treatments. I provide theoretical analysis of the problem, discuss the implications for empirical practice, and demonstrate with a numerical study calibrated on real-world data. (JEL C26, G51, H24, J13)