| 来源类型 | Working Paper |
| 规范类型 | 报告 |
| DOI | 10.3386/w27546 |
| 来源ID | Working Paper 27546 |
| Policy Evaluation with Multiple Instrumental Variables | |
| Magne Mogstad; Alexander Torgovitsky; Christopher R. Walters | |
| 发表日期 | 2020-07-20 |
| 出版年 | 2020 |
| 语种 | 英语 |
| 摘要 | Marginal treatment effect methods are widely used for causal inference and policy evaluation with instrumental variables. However, they fundamentally rely on the well-known monotonicity (threshold-crossing) condition on treatment choice behavior. Recent research has shown that this condition cannot hold with multiple instruments unless treatment choice is effectively homogeneous. Based on these findings, we develop a new marginal treatment effect framework under a weaker, partial monotonicity condition. The partial monotonicity condition is implied by standard choice theory and allows for rich heterogeneity even in the presence of multiple instruments. The new framework can be viewed as having multiple different choice models for the same observed treatment variable, all of which must be consistent with the data and with each other. Using this framework, we develop a methodology for partial identification of clearly stated, policy-relevant target parameters while allowing for a wide variety of nonparametric shape restrictions and parametric functional form assumptions. We show how the methodology can be used to combine multiple instruments together to yield more informative empirical conclusions than one would obtain by using each instrument separately. The methodology provides a blueprint for extracting and aggregating information about treatment effects from multiple controlled or natural experiments while still allowing for rich heterogeneity in both treatment effects and choice behavior. |
| 主题 | Econometrics ; Estimation Methods |
| URL | https://www.nber.org/papers/w27546 |
| 来源智库 | National Bureau of Economic Research (United States) |
| 引用统计 | |
| 资源类型 | 智库出版物 |
| 条目标识符 | http://119.78.100.153/handle/2XGU8XDN/585219 |
| 推荐引用方式 GB/T 7714 | Magne Mogstad,Alexander Torgovitsky,Christopher R. Walters. Policy Evaluation with Multiple Instrumental Variables. 2020. |
| 条目包含的文件 | ||||||
| 文件名称/大小 | 资源类型 | 版本类型 | 开放类型 | 使用许可 | ||
| w27546.pdf（455KB） | 智库出版物 | 限制开放 | CC BY-NC-SA | 浏览 | ||
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