Under the two situations in which cross influences do not exist and do exist, the different control structure and incentive level for member enterprise to increase input, and thus the influence on group welfare are studied.

• 区别不存在企业间交互影响和考虑企业间交互影响两种情况，考察了不同控制结构和资源配置方式下，集团内企业在提高投人的激励方面的变化，及其对集团整体福利的影响。