Corrigendum: Instrumental Variables with Unrestricted Heterogeneity and Continuous Treatment

• Autores: Stefan G. N. Hoderlein, Hajo Holzmann, Maximilian Kasy, Alexander Meister
• Localización: Review of economic studies, ISSN 0034-6527, Vol. 84, Nº 2, 2017, págs. 964-968
• Idioma: inglés
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• Resumen

  • Kasy (2014) considers a triangular system of equations characterized by the following assumptions:

    Under these assumptions, the following definitions are introduced:

    It is claimed in the statement and proof of Kasy (2014),, theorem 1, that under these assumptions:

    P(Y≤y|X=x,Z=z)=P(Yx≤y|X=x,Z=z)=P(Yx≤y|Zx=z,Z=z)=P(Yx≤y|Zx=z).

    This assertion is wrong, the following theorem 1 states a corrected version. For theorem 1 to hold, we need to additionally impose the following regularity conditions.

    The second part of assumption 5