Asymptotic Estimation and Hypothesis Testing Results for Vector Linear Time Series Models
向量线性时间序列模型的渐近估计与假设检验结果AI 解读 ↓
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向量线性时间序列模型的渐近估计与假设检验结果AI 解读 ↓
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For a general vector linear time series model we prove the strong consistency and asymptotic normality of parameter estimates obtained by maximizing a particular time domain approximation to a Gaussian likelihood, although we do not assume that the observations are necessarily normally distributed. To solve the normal equations we set up a constrained Gauss-Newton iteration and obtain the properties of the iterates when the sample size is large. In particular we show that the iterates are efficient when the iteration begins with a VN- consistent estimator. We obtain similar results to the above for a frequency domain approximation to a Gaussian likelihood. We use the asymptotic estimation theory to obtain the asymptotic distribution of several familiar test statistics for testing nonlinear equality constraints.