合成控制方法(Synthetic Control Method, SCM)通过创建一个合成的控制单元,来估计一个特定干预(如政策变更、经济干预等)的效果。这个合成的控制单元是从一个没有接受干预的控制单元的捐赠者池中,通过加权平均的方式构建出来的。这种方法特别适用于案例研究(case studies),其中只有一个单元或少数几个单元接受了干预. 计...
$retprice <dbl> 39.3, 39.9, 30.6, 38.9, 34.3, 38.4, 31.4, 37.3, 36.7, 28.8, 41.4, 38.5, 34.6, 34.3, 3~ $name <chr> "control", "control", "control", "control", "control", "control", "control", "control~ ...
为了进行推断,该方法依赖于对供体池中的每个供体重复该方法,就像对治疗单位所做的那样,即生成安慰剂合成对照)。通过在使用synthetic_control初始化synth时设置generate_placebos = TRUE,在构造感兴趣的合成控制时将自动生成安慰剂案例。这就很容易探索观察到的和合成的单位之间的独特差异,当与安慰剂相比 smoking_out %...
为了进行推断,该方法依赖于对供体池中的每个供体重复该方法,就像对治疗单位所做的那样,即生成安慰剂合成对照)。通过在使用synthetic_control()初始化synth时设置generate_placebos = TRUE,在构造感兴趣的合成控制时将自动生成安慰剂案例。这...
广义合成控制法"(2017, political analysis). 该方法能够有效缓解SCM存在的"只能研究单地区、单次冲击...
The synthetic control method (SCM) is a popular approach for estimating the impact of a treatment on a single unit in panel data settings. The "synthetic control" is a weighted average of control units that balances the treated unit's pre-treatment outcomes and other covariates as closely as...
Iteratively apply the synthetic control method to every potential control and obtain placebo effects ("in-space placebos"). 将实验对象与donor pool轮换,检验是否还有效应 Alternatively, one can use the longitudinaldimensionof the data to produce placebo studies ("in-time placebos"). ...
Synthetic Control Method 来自 Springer 喜欢 0 阅读量: 7 作者: G Cerulli 摘要: This chapter presents the Synthetic Control Method (SCM) proposed by Abadie and Gardeazabal (2003) and Abadie, Diamond, and Hainmueller (2010), a powerful approach to extending the counterfactual approach to assess...
2021/4/25 陈强,(c) 2021 3 SCMSCM的思想的思想 • Abadie and Gardeazabal (2003)提提出“合合 成控制控制法”(syynthetic control method)。 • 虽无法找到北京的最佳控制地区虽无法找到北京的最佳控制地区,,但可对但可对 中国的若干大城市进行适当的线性组合, 构造构造一个更为优秀的个更为优秀的 “...
The synthetic control method (SCM) is a useful tool in providing unbiased analysis on the policy effect in real-world health policy evaluations. Through controlling for a few confounding factors, we aim to apply SCM in analyzing the impact of the pricing reform on medical expenditure structure in...