中文摘要：

同行业的企业其战略为什么会呈现出多样性？随着时间的发展，行业内的企业战略如何调整其战略？资源基础理论强调行业市场环境的压力，认为同行业内的企业会呈现出异质化的趋向；而制度主义理论则强调行业制度环境的压力，认为会呈现出同质化的趋向。本文从资源基础理论和制度主义理论出发，分别考察行业市场压力和制度压力对行业内企业战略多样性的影响，以及这两种影响作用在转型中国随着年份而发生的变化。使用2000年至2006年的工业企业数据检验的结果发现，市场压力对战略多样性有正向作用，而制度压力对战略多样性有负向作用。二者随着时间的发展并未呈现直接而明显的变化。

英文摘要：

Whether firms in the same industry will show isomorphism or heterogeneity over time？ The resource-based view of the firm states that firms can create a competitive advantage through heterogeneity in resources and capabilities, while the institutional perspective from organization theory emphasizes the institutional pressures which lead to firm isomorphism and legitimacy. Therefore, this paper combines the insights of a resource-based view with institutionalism by examining the role of market and institutional forces in affecting industry strategic variety and the evolution of these two forces over year in transitional China. Empirical results of Chinese industrial enterprise data from 2000 to 2006 suggest that industry competitiveness has a positive influence on intra-industry strategic variety while industry state ownership has a negative influence, which mean that, the higher the degree of industry competitiveness, the more heterogeneous of intra-industry strategies and the higher the degree of industry state ownership, the more homogeneous of intra-industry strategies. However, the interaction effects are not simple and clear. Possible reasons are discussed. Thus, consideration of both market and institutional factors of the industry makes for a better understanding of intra-industry strategic variety during the institutional transition of China.