An Alternative Assumption to Identify LATE in Regression Discontinuity Designs

An Alternative Assumption to Identify LATE in Regression Discontinuity Designs
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在回归不连续性设计中识别 LATE 的另一种假设

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发表时间:
2014
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通讯作者:
Yingying Dong
Yingying Dong
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作者:
Yingying Dong

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回归不连续性(RD)设计的关键识别假设之一是局部独立性假设(LIA)。本文表明,LIA提出了一个限制治疗效果的异质性,因此可能不会在许多实证应用。然后,本文表明,在尖锐和模糊设计中的LATE可以在替代光滑条件下识别,并且在Lee(2008)的精神下,给定弱的和经验上可接受的行为假设,可以满足所需的光滑性。一个充分条件(但强于必要条件)是运行变量的条件密度的平滑性,这为模糊RD设计中的McCrary(2008)密度检验提供了正式的理由。理论和经验的相关性的讨论说明在两个实证应用。JEL代码:C21,C25
One of the key identifying assumptions for regression discontinuity (RD) designs is the local independence assumption (LIA). This paper shows that LIA puts a restriction on treatment effect heterogeneity and hence may not hold in many empirical applications. This paper then shows that LATE in both sharp and fuzzy designs can be identified under alternative smoothness conditions, and that the required smoothness can be satisfied given a weak and empirically plausibly behavioral assumption, in the spirit of Lee (2008). A sufficient (but stronger than necessary condition) is smoothness of the conditional density of the running variable, which provides formal justification for McCrary’s (2008) density test in fuzzy RD designs. Theoretical and empirical relevance of the discussion is illustrated in two empirical applications. JEL codes: C21, C25
具有非经典测量误差的回归不连续性设计
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发表时间: 2017
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作者:
Toru Takahashi;Keisuke Hosokawa;Satonori Nozawa;Takuo T. Tsuda;Yasunobu Ogawa;Masaki Tsutsumi;Yasutaka Hiraki;Hitoshi Fujiwara;Takuya D. Kawahara;Norihito Saito;Satoshi Wada;Tetsuya Kawabata;Chris Hall;and Hiroshi Miyaoka;Takahide Yanagi
通讯作者: Takahide Yanagi