CAJ | 학술논문

本文基于中国2007年-2013年和美国2004年-2013年B2C电子商务的市场份额数据，通过回归拟合分析验证了存在于中美两国B2C电子商务市场竞争结构中的幂律分布，并进一步揭示了其市场竞争结构随时间变化的动态发展规律。研究结果表明，中美两国B2C电子商务竞争结构幂律拟合结果的可决系数在74%-98%之间变化，电子商务市场竞争结构符合幂定律。从时间发展的动态规律来看，其竞争结构幂定律中的系数c和指数a整体呈现递增的趋势，即中美电子商务市场的竞争变得越来越激烈。
본문기우중국2007년-2013년화미국2004년-2013년B2C전자상무적시장빈액수거，통과회귀의합분석험증료존재우중미량국B2C전자상무시장경쟁결구중적멱률분포，병진일보게시료기시장경쟁결구수시간변화적동태발전규률。연구결과표명，중미량국B2C전자상무경쟁결구멱률의합결과적가결계수재74%-98%지간변화，전자상무시장경쟁결구부합멱정률。종시간발전적동태규률래간，기경쟁결구멱정률중적계수c화지수a정체정현체증적추세，즉중미전자상무시장적경쟁변득월래월격렬。
Based on the E-commerce market share data of China (2007-2013) and US (2004-2013), power-law distribution of market competition structure in B2C e-commerce markets of China and US are veriifed, and the evolvement rules of competition structure change over time are revealed through regression analysis. The results show that coefifcient of determination for Power-law distribution rule in China and US E-commerce markets' competition structures can vary from 74% to 98%. From the aspect of the dynamic development of the competition structure, the coefifcients c and a in the power-law distribution keep increasing, which shows an increasingly monopoly in both market.