Weak Identification in Low-Dimensional Factor Models with One or Two Factors
单因子或双因子低维因子模型中的弱识别AI 解读 ↓
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AI 根据所提供的论文材料归类:摘要直接研究因子模型的重新参数化与弱识别检验,应用对象为父母对子女的投入。
单因子或双因子低维因子模型中的弱识别AI 解读 ↓
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Abstract This paper describes how to reparametrize low-dimensional factor models with one or two factors to fit weak identification theory developed for generalized method of moments models. Some identification-robust tests, here called “plug-in” tests, require a reparametrization to distinguish weakly identified parameters from strongly identified parameters. The reparametrizations in this paper make plug-in tests available for subvector hypotheses in low-dimensional factor models with one or two factors. Simulations show that the plug-in tests are less conservative than identification-robust tests that use the original parametrization. An empirical application to a factor model of parental investments in children is included.