统计研究 ›› 2010, Vol. 27 ›› Issue (2): 77-82.

• 论文 • 上一篇    下一篇

社会核算矩阵不同更新方法的比较研究

万兴 范金 胡汉辉   

  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2010-02-15 发布日期:2010-02-15

Research on Comparing Social Accounting Matrix Updating Methods

Wan Xing Fan Jin Hu Hanhui   

  • Received:1900-01-01 Revised:1900-01-01 Online:2010-02-15 Published:2010-02-15

摘要: 更新社会核算矩阵(Social Accounting Matrix, SAM)作为一种非调查技术一直受到普遍重视。本文用十种更新方法,包括RAS法、交叉熵法、广义交叉熵法等,以江苏省1997年的宏观和细化SAM为初始表,将其分别更新到2002年的宏观和细化SAM。我们通过保号检验、方向检验和接近程度检验比较了各种方法的更新结果。研究结论显示:第一,基于商的更新方法要优于基于距离的更新方法;第二,保号类方法不仅具有保号的功能,而且在方向检验和接近度检验中有着良好表现;第三,对某些重要系数采用适当的外生估算方式,可以提高SAM更新的精度。

关键词: 社会核算矩阵, 更新方法, 竞赛

Abstract: Updating social accounting matrix (SAM), as a non-survey technique, is always stresses. The paper uses 10 methods to update Jiangsu province’s macro and micro SAM from 1997 to 2002, including RAS, generalized RAS and cross entropy methods. We adopt sign-preservation test, direction test and closeness test to compare the methods, and draw the following conclusions. Firstly, quotient-based updating methods are better than distance-based methods. Secondly, sign-preservation methods also have good performance in direction test and closeness test. Thirdly, external estimation on key coefficients is necessary for upgrading SAM updating accuracy.
 

Key words: SAM, Updating methods, Competition