煤炭洗选企业产品结构方案与经济效益模型分析

针对适合地区和企业技术特点确定符合循环经济发展模式的产品生产方案和考虑企业本身生产经济性的研究不足的状况,重点对青海省海北地区的跳汰-浮选工艺选煤企业,基于地区煤质特点,利用产品结构优化三原则进行分析,提出企业产品结构方案;在此基础上,利用系统工程理论建立了多种条件约束下的企业经济利润最大化的经济模型;最后以约束条件为关联,绘制产品结构方案-经济模型关联图。其研究成果可具体指导青海海北地区选煤企业进行产品结构调整和经济效益分析,也为地区行业管理提供理论参考。     

Differences in large and small firm responses to environmental context: strategic implications from a comparative analysis of business formations

Despite growing recognition of some strategic advantages held by small firms, little comparative research has been performed on the advantages and disadvantages accruing to firm size. In order to delineate the differential responses of small and large businesses to their environmental context, we perform a comparative analysis of the impact of industry structural characteristics on the formation of large and small businesses in a large sample of U.S. manufacturing industries from 1977 to 1987. The results suggest that small businesses possess certain resources that allow them to overcome some barriers which create greater difficulties for their larger counterparts, as well as allow small businesses to exploit certain industry opportunities more readily than larger ones. © 1998 John Wiley & Sons, Ltd.