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We describe observation driven time series models for Student-t and EGB2 conditional distributions in which the signal is a linear function of past values of the score of the conditional distribution. These specifications produce models that are easy to implement and deal with outliers by what...
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We consider estimation and inference for a regression coefficient in panels with interactive fixed effects (i.e., with a factor structure). We show that previously developed estimators and confidence intervals (CIs) might be heavily biased and size-distorted when some of the factors are weak. We...
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mean of the outcome variable, we derive estimators and confidence intervals (CIs) that are optimal infinite samples when the … conditional mean. We also derive the minimum smoothness conditions on the conditional mean that are necessary for √n …-inference. When the conditional mean is restricted to be Lipschitz with a large enough bound on the Lipschitz constant, the optimal …
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) under the assumption of normal errors when the conditional mean of the outcome variable is constrained only by nonparametric … smoothness and/or shape restrictions. When the conditional mean is restricted to be Lipschitz with a large enough bound on the …
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