Editor's note: Recently, some domestic listed companies significantly lowered their performance forecasts, sending shockwaves through the stock market and causing investors to panic. Xiong Jinqiu, a ...

For more than a decade, cloud infrastructure sat comfortably in the domain of engineering. It was framed as a technical ...

One of the key assumptions of the ordinary regression model is that the errors have the same variance throughout the sample. This is also called the homoscedasticity ...