入门(以使用求和符号为代表):Wooldridge, J Introductory Econometrics: A Modern A Cengage Learning, Stock, James H, and Mark W W Introduction to E Addison-Wesley, Hill, R Carter, William E Griffiths, and Guay C L Principles of E Wiley, Verbeek, M A Guide to Modern E John Wiley & Sons,