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时间:2020-03-29
《检验多重共线性.doc》由会员上传分享,免费在线阅读,更多相关内容在教育资源-天天文库。
1、实验目的:在回归模型牵涉到多个自变量的时候,自变量之间可能会相互关联,即他们之间存在有多重共线性,本节实验的实验目的是如何用Eviews检测各个自变量之间是否存在的多重共线问题以及如何对多重共线性进行修正。我们实验的原始数据如图所示,判断钢产量y与生铁产量X1,发电量X2,固定资产投资X3,国内生产总值X4,铁路运输量X5之间的关系。年份钢材产量Y生铁产量X1发电量X2固定资产投资X3国内生产总值X4铁路运输量X51978220834792566668.7232641101191979249736732820699.3640381118931980271638023
2、006746.945181112791981267034173093638.2148621076731982292035513277805.952951134951983307237383514885.26593511878419843372400137701052.43717112407419853693438441071523.51896413070919864058506444951795.321020213563519874386550349732101.691196314065319884689570454522554.861492814494819894
3、859582058482340.5216909151489199051536238621225341854815068119915638676567753139.032161815289319926697758975394473.762663815762719937716895683956811.353463416266319948428974192819355.354675916309319958980105291007010702.975847816585519969338107231081312185.79678851688031997997911511113
4、5613838.9674463169734实验步骤:1:打开Eviews7.0.→File→Workfile,选择年度数据,在初始日期和结束日期分别输入“1978”和结束年份“1997”。点击“OK”确定。b5E2RGbCAP2:在新建工作表中,点击Proc→Import→Read,选定需要导入的Excel工作表,在“Upper-leftdatacell”中输入数据在Excel中的初始位置“B2”,在“Excel5+….”中输入“sheet1”,在“Nameforserises、”中输入“yx1x2x3x4x5”点击“OK”即可。p1EanqFDPw3:在Eview
5、s空白处输入:“lsycx1x2x3x4x5”,回车即可,结果如下。DependentVariable:YMethod:LeastSquaresDate:04/19/13Time:11:24Sample:19781997Includedobservations:20VariableCoefficientStd.Errort-StatisticProb. C354.5884435.69680.8138420.4294X10.0260410.1200640.2168920.83144/4X20.9945360.1364747.2873800.0000X30.39267
6、60.0864684.5412710.0005X4-0.0854360.016472-5.1866490.0001X5-0.0059980.006034-0.9940190.3371R-squared0.999098 Meandependentvar5153.450AdjustedR-squared0.998776 S.D.dependentvar2512.131S.E.ofregression87.87969 Akaikeinfocriterion12.03314Sumsquaredresid108119.8 Schwarzcriterio
7、n12.33186Loglikelihood-114.3314 Hannan-Quinncriter.12.09145F-statistic3102.411 Durbin-Watsonstat1.919746Prob(F-statistic>0.000000经查表可知,t<17)=1.345,结合上表可知,x1和x5没有通过t检验,而且F检验较大,估计解释变量之间可能存在着多重共线性。相关性如下图所示:DXDiTa9E3dX1X2X3X4X5X110.9951830.9696450.9731040.930383X20.99518310.959616
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