上市公司规模及成长率概率分布对比实验研究

Comparing Experiment of Size and Growth Rate Probability Distributions of Listed Companies in China

在引入非系统变量(所属行业、经济性质)和系统变量(通货膨胀、政策周期)的条件下,采用对比实验法分别消除这4个变量的影响,并建立相应的“实验组”进行规模和成长率概率分布的拟合,然后与未消除变量的“对照组”进行对比,从而证明了企业的规模概率分布服从正态分布、成长率概率分布服从拉普拉斯分布是一个必然现象,并不受企业自身属性和外部环境等因素的影响,因此必须通过提高上市公司质量来整体提高其成长性。

Non-system variables （trade, nature of economy） and system variables （inflation, policy cycles） are introduced into this comparing experiment to eliminate the influence of these 4 variables separately. A series of experimental panel are established to carry on the fitting of probability density distributions of the sizes and growth rates. Then the experimental panels are compared with the sample panel in which the influence of variables hasn＇t been evaluated. All the results prove that the sizes and growth rates of listed companies in China do separately submit to Normal Distribution and Laplace Distribution and they won＇t be affected by the factors such as nature of enterprises or external environment condition, etc. In that case, the quality of all listed companies should be comprehensively improved to increase their growth rates.