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目的:研究我国制药业不同时期集中度的影响因素。方法:对我国制药业1992～2007年的绝对集中度和相关变量数据进行回归分析。结果:1992～1999年期间,期初集中度影响为负,生产扩张能力影响为正;2000～2007年期间,期初集中度、市场容量增长率影响为正,生产扩张能力影响为负。结论:我国制药业集中度在1992～1999年的快速成长期和2000～2007年的转型期有着不同的变化趋势,集中度影响因素及其影响程度也是在不断的变化之中。
Objective: To study the influencing factors of the concentration of pharmaceutical industry in different periods in China. Methods: Regression analysis was made on the data of absolute concentration and related variables in China’s pharmaceutical industry from 1992 to 2007. Results: During the period from 1992 to 1999, the effect of concentration at the beginning of the period was negative and the effect of production expansion capacity was positive. From 2000 to 2007, the effect of the concentration of the beginning of the period and the growth of market capacity was positive, and the impact of production capacity expansion was negative. Conclusion: The concentration of pharmaceutical industry in China has a tendency of rapid change from 1992 to 1999 and from 2000 to 2007, and the influencing factors of concentration are changing constantly.