中文摘要：

从产业角度对中国劳动收入占比的变化进行实证研究，可以发现，产业结构变化和不同产业劳动收入占比以正相关性同时变化，均加剧了劳动收入占比的波动。基于产业数据对劳动收入占比变化进行分解，可以发现：相对于1993年，1996年劳动收入占比上升主要是由第二产业劳动收入占比提高造成的；相对于1996年，2003年劳动收入占比下降主要与第一产业比重下降有关；2004年的情况比较特殊，这一年劳动收入占比剧烈下降主要源于统计口径变化，造成第二、三产业劳动收入占比大幅减少。劳动收入占比在地区之间存在巨大差异，但是随着时间的推移，该差异在逐渐缩小，这与产业结构和产业内劳动收入占比的变化也密切相关。

英文摘要：

Empirical study of sectoral-level change in LIS in China reveals that change in industry structure is synchronous and positively correlated with LIS in different sectors of the economy, intensifying overall LIS fluctuations. Our analysis of LIS based on data from the major sectors of China＇s economy show that, relative to 1993, the increase in LIS in 1996 was largely due to the increased proportion of LIS in secondary industry. Relative to 1996, the fall in LIS in 2003 was closely related to the fall in the proportion of primary industry in the overall economy. The year 2004 was unusual in that it witnessed a dramatic fall in overall LIS level. The primary reason for the fall was a change in statistical definition that led to a significant reduction in LIS in the secondary and tertiary sectors. There were huge variations in LIS level among different regions. However, with the passage of time, the regional disparities are gradually being reduced. This is also closely connected to changes in industry structure and within-sector LIS fluctuations.