关键词: 关键词：收入分布, 基尼系数；洛仑兹曲线；随机占优

Abstract: Abstract: Based on the Chinese A-share listed companies’ database from 1998 to 2009, we study the labor income share of the national income’s primary distribution empirically. We investigate the contribution of labor to output by estimating the production function and analyze the reason of the labor income share’s deviation from the labor contribution further using the system GMM method. We find the labor income share of the primary distribution is on the low side and presents the U-shape trend which is more remarkable against the economic cycle. From the estimated results of the production function, the labor income share owned by labor is well lower than their contribution to output which is unfair to the labor in the companies’ primary distribution. According to the trend of labor contribution to output, it is increasing gradually. Although this expands the disparity from the labor income share, but it also plays a positive role in raising the labor income share later. Further analysis shows that the degree of competition in product markets, the bargaining power of labors and economic fluctuations are important factors which caused the deviation between labor income share and labor contribution.

Key words: Key words: Primary Distribution, Labor Income Share, Factor Contribution