The Causal Interpretation of Two-Stage Least Squares with Multiple Instrumental Variables
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Empirical researchers often combine multiple instrumental variables (IVs) for a single treatment using two-stage least squares (2SLS). When treatment effects are heterogeneous, a common justification for including multiple IVs is that the 2SLS estimand can be given a causal interpretation as a
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美国国家经济研究局创建时间：
2019-03-01
