| 来源类型 | Working Paper |
| 规范类型 | 报告 |
| DOI | 10.3386/w23568 |
| 来源ID | Working Paper 23568 |
| Using Instrumental Variables for Inference about Policy Relevant Treatment Effects | |
| Magne Mogstad; Andres Santos; Alexander Torgovitsky | |
| 发表日期 | 2017-07-17 |
| 出版年 | 2017 |
| 语种 | 英语 |
| 摘要 | We propose a method for using instrumental variables (IV) to draw inference about causal effects for individuals other than those affected by the instrument at hand. Policy relevance and external validity turns on the ability to do this reliably. Our method exploits the insight that both the IV estimand and many treatment parameters can be expressed as weighted averages of the same underlying marginal treatment effects. Since the weights are known or identified, knowledge of the IV estimand generally places some restrictions on the unknown marginal treatment effects, and hence on the values of the treatment parameters of interest. We show how to extract information about the average effect of interest from the IV estimand, and, more generally, from a class of IV-like estimands that includes the two stage least squares and ordinary least squares estimands, among many others. Our method has several applications. First, it can be used to construct nonparametric bounds on the average causal effect of a hypothetical policy change. Second, our method allows the researcher to flexibly incorporate shape restrictions and parametric assumptions, thereby enabling extrapolation of the average effects for compliers to the average effects for different or larger populations. Third, our method can be used to test model specification and hypotheses about behavior, such as no selection bias and/or no selection on gain. To accommodate these diverse applications, we devise a novel inference procedure that is designed to exploit the convexity of our setting. We develop uniformly valid tests that allow for an infinite number of IV--like estimands and a general convex parameter space. We apply our method to analyze the effects of price subsidies on the adoption and usage of an antimalarial bed net in Kenya. |
| 主题 | Econometrics ; Estimation Methods |
| URL | https://www.nber.org/papers/w23568 |
| 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/581242 |
| 推荐引用方式 GB/T 7714 | Magne Mogstad,Andres Santos,Alexander Torgovitsky. Using Instrumental Variables for Inference about Policy Relevant Treatment Effects. 2017. |
| 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 | ||
| w23568.pdf（1203KB） | 智库出版物 | 限制开放 | CC BY-NC-SA | 浏览 | ||
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