計量經(jīng)濟(jì)學(xué)論文(eviews分析)-中國食品價格指數(shù)的影響因素分析(編輯修改稿)
2025-07-10 15:24 本頁面
【文章內(nèi)容簡介】 由上圖可看出，剔除 x3后，擬合優(yōu)度非常好，且顯著性明顯。 再剔除 x1進(jìn)行回歸，結(jié)果入下： Dependent Variable: Y Method: Least Squares Date: 05/31/12 Time: 21:43 Sample: 2021:08 2021:10 Included observations: 27 Variable Coefficient Std. Error tStatistic Prob. 6 C X2 X3 X4 Rsquared Mean dependent var Adjusted Rsquared . dependent var . of regression Akaike info criterion Sum squared resid Schwarz criterion Log likelihood Fstatistic DurbinWatson stat Prob(Fstatistic) 由上圖可以看出，剔除 x1 后，導(dǎo)致 x4通不過 t檢驗。 剔除 x2 進(jìn)行回歸，結(jié)果如下： Dependent Variable: Y Method: Least Squares Date: 05/31/12 Time: 21:41 Sample: 2021:08 2021:10 Included observations: 27 Variable Coefficient Std. Error tStatistic Prob. C X1 X3 X4 Rsquared Mean dependent var Adjusted Rsquared . dependent var . of regression Akaike info criterion Sum squared resid Schwarz criterion Log likelihood Fstatistic DurbinWatson stat Prob(Fstatistic) 由上圖可知，剔除 x2 后，導(dǎo)致 x1， x4都通不過 t檢驗，且可決系數(shù)大幅降低。 剔除 x4 進(jìn)行回歸，結(jié)果入下： Dependent Variable: Y Method: Least Squares Date: 05/31/12 Time: 21:44 Sample: 2021:08 2021:10 7 Included observations: 27 Variable Coefficient Std. Error tStatistic Prob. C X1 X2 X3 Rsquared Mean dependent var Adjusted Rsquared . dependent var . of regression Akaike info criterion Sum squared resid Schwarz criterion Log likelihood Fstatistic DurbinWatson stat Prob(Fstatistic) 由上圖可看出， x4的存在不影響本文的分析結(jié)果，沒必要剔除。 所以綜上所述，剔除 x3，得到一下回歸分析結(jié)果： Dependent Variable: Y Method: Least Squares Date: 05/31/12 Time: 21:40 Sample: 2021:08 2021:10 Included observations: 27 Variable Coefficient Std. Error tStatistic Prob. C X1 X2 X4 Rsquared Mean dependent var Adjusted Rsquared . dependent var . of regression Akaike info criterion Sum squared resid Schwarz criterion Log likelihood Fstatistic DurbinWatson stat Prob(Fstatistic) 得到的回歸方程為 ^Y =+ + + () () () () R2= Adjust
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