Testing firm conduct
企业行为检验AI 解读 ↓
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AI 根据所提供的论文材料归类:摘要围绕不完全竞争市场的企业行为模型选择,并以纵向定价行为作结构性经验检验。
企业行为检验AI 解读 ↓
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Evaluating policy in imperfectly competitive markets requires understanding firm behavior. While researchers test conduct via model selection and assessment, we present the advantages of Rivers and Vuong (2002) (RV) model selection under misspecification. However, degeneracy of RV invalidates inference. With a novel definition of weak instruments for testing, we connect degeneracy to instrument strength, derive weak instrument properties of RV, and provide a diagnostic for weak instruments by extending the framework of Stock and Yogo (2005) to model selection. We test vertical conduct (Villas‐Boas (2007)) using common instrument sets. Some are weak, providing no power. Strong instruments support manufacturers setting retail prices.