xtreg y x control, fe (先要运行固定效应模型) xttest3 (检验组间异方差,原假设是同方差,P值小于0.1,说明存在组间异方差) xtserial y x control (组内自相关检验,原假设是不存在组内自相关的) xtreg y x control,fe xttest2 (组间同期相关检验,缺陷是仅适用于长面板,原假设是不存在截面相关) xtcsd, ...
Virtus Convertible & Income Fund (NCV) 3.575+0.06(+1.56%)USD | NYSE | Oct 09, 16:00 3.5750.00 (0.00%)After-Hours: 16:39 Benchmark:Broad Asset Class Broad Asset Class YCharts Categorization Stress Test Gauge how stocks, ETFs, mutual funds, and Model Portfolio perform during several period...
ncvTest异方差检验原理 异方差 f检验 总第225篇/张俊红 我们前面讲了异方差,也讲了怎么用图示法来判断是否有异方差,这一篇来讲讲怎么用统计的方法来判断有没有异方差。 关于检验异方差的统计方法有很多,我们这一节只讲比较普遍且比较常用的white test(怀特检验)。 假设现在我们做了如下的回归方程: 如果要用怀特...
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EMG/NCS What to expect during the test. An EMG/NCV is a Nerve and Muscle examination. The nerve study is done by using electrical impulses on the arms and legs to test nerves that are connected to the neck and lower back. The muscle study is done by using a needle electrode to ...
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