| 来源类型 | Working Paper |
| 规范类型 | 报告 |
| DOI | 10.3386/w22791 |
| 来源ID | Working Paper 22791 |
| Balancing, Regression, Difference-In-Differences and Synthetic Control Methods: A Synthesis | |
| Nikolay Doudchenko; Guido W. Imbens | |
| 发表日期 | 2016-10-31 |
| 出版年 | 2016 |
| 语种 | 英语 |
| 摘要 | In a seminal paper Abadie et al (2010) develop the synthetic control procedure for estimating the effect of a treatment, in the presence of a single treated unit and a number of control units, with pre-treatment outcomes observed for all units. The method constructs a set of weights such that covariates and pre-treatment outcomes of the treated unit are approximately matched by a weighted average of control units. The weights are restricted to be nonnegative and sum to one, which allows the procedure to obtain the weights even when the number of lagged outcomes is modest relative to the number of control units, a setting that is not uncommon in applications. In the current paper we propose a more general class of synthetic control estimators that allows researchers to relax some of the restrictions in the ADH method. We allow the weights to be negative, do not necessarily restrict the sum of the weights, and allow for a permanent additive difference between the treated unit and the controls, similar to difference-in-difference procedures. The weights directly minimize the distance between the lagged outcomes for the treated and the control units, using regularization methods to deal with a potentially large number of possible control units. |
| 主题 | Econometrics ; Estimation Methods |
| URL | https://www.nber.org/papers/w22791 |
| 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/580464 |
| 推荐引用方式 GB/T 7714 | Nikolay Doudchenko,Guido W. Imbens. Balancing, Regression, Difference-In-Differences and Synthetic Control Methods: A Synthesis. 2016. |
| 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 | ||
| w22791.pdf（314KB） | 智库出版物 | 限制开放 | CC BY-NC-SA | 浏览 | ||
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