Descriptions on the background of the topic and the sample data you chose. Then run several different regression models (two or three) with variables and analyze their differences using Stata. I will provide the professor’s instruction to you in the attachment, which is crucial and all the requirements inside should be fulfilled. Additional information I collected will also be uploaded as a reference to you. From the PPT I provided, you need to choose at least four variables and at least two models to compare the multicollinearity, heteroskedasticity, and serial correlation.