发布时间 : 星期四 文章计量经济学（四版）习题及详细答案详细版更新完毕开始阅读065d79b7ab00b52acfc789eb172ded630a1c9852
个人收集整理 勿做商业用途
表中r12＝0.896，r13＝0.895，说明施肥量与有效灌溉面积和播种面积间高度相关. 我们可以通过对变量X2地变换来消除多重共线性.令X22＝X2/X3（公斤/亩），这样就大大降低了施肥量与面积之间地相关性，用变量X22代替X2，对模型重新回归，结果如下：文档收集自网络，仅用于个人学习 =－233.62 + 0.088X1 + 13.66*X2 + 0.096X3 - 0.099X4 R2＝0.91文档收集自网络，仅用于个人学习 t: (-3.10) (2.48) (3.91) (4.77) (-3.19)文档收集自网络，仅用于个人学习 从回归结果地t值可以看出，现在各个变量都已通过显著性检验，说明多重共线性问题基本得到解决.
个人收集整理 勿做商业用途
版权申明
本文部分内容，包括文字、图片、以及设计等在网上搜集整理。版权为张俭个人所有
This article includes some parts, including text, pictures, and design. Copyright is Zhang Jian's personal ownership.
用户可将本文的内容或服务用于个人学习、研究或欣赏，以及其他非商业性或非盈利性用途，但同时应遵守著作权法及其他相关法律的规定，不得侵犯本网站及相关权利人的合法权利。除此以外，将本文任何内容或服务用于其他用途时，须征得本人及相关权利人的书面许可，并支付报酬。
Users may use the contents or services of this article for personal study, research or appreciation, and other non-commercial or non-profit purposes, but at the same time, they shall abide by the provisions of copyright law and other relevant laws, and shall not infringe upon the legitimate rights of this website and its relevant obligees. In addition, when any content or service of this article is used for other purposes, written permission and remuneration shall be obtained from the person concerned and the relevant obligee.
个人收集整理 勿做商业用途
转载或引用本文内容必须是以新闻性或资料性公共免费信息为使用目的的合理、善意引用，不得对本文内容原意进行曲解、修改，并自负版权等法律责任。
Reproduction or quotation of the content of this article must be reasonable and good-faith citation for the use of news or informative public free information. It shall not misinterpret or modify the original intention of the content of this article, and shall bear legal liability such as copyright.