Under-identification of structural models based on timing and information set assumptions
基于时序与信息集假设的结构模型识别不足AI 解读 ↓
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基于时序与信息集假设的结构模型识别不足AI 解读 ↓
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We revisit identification based on timing and information set assumptions in structural models, which have been used in the context of production functions, demand equations, and hedonic pricing models (e.g. Olley and Pakes, 1996, Blundell and Bond, 2000). First, we demonstrate a general under-identification problem using these assumptions in a simple version of the Blundell–Bond dynamic panel model. In particular, the basic moment conditions can yield multiple discrete solutions: one at the persistence parameter in the main equation and another at the persistence parameter governing the regressor. We then propose a possible solution in the simple setting by enforcing an assumed sign restriction and discuss more general practical advice for empirical researchers using these methods.
基于时序与信息集假设的结构模型识别不足
We revisit identification based on timing and information set assumptions in structural models, which have been used in the context of production functions, demand equations, and hedonic pricing models (e.g. Olley and Pakes (1996), Blundell and Bond (2000)). First, we demonstrate a general under-identification problem using these assumptions in a simple version of the Blundell-Bond dynamic panel model. In particular, the basic moment conditions can yield multiple discrete…
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