通过计算CR_4和I_HH两个指数，得到的结果都表明广东报业市场结构，无论是发行市场，还是广告市场都属于高度寡占型，基本由四大报业集团垄断。
The calculated indexes of CR4 and IHH show that Guangdong's newspaper market dominated by four newspaper groups, including issuing market and advertisement market, belongs to the style of oligopoly.
长期以来，石油产业组织效率低下，一个很重要的原因是没有形成寡占型市场结构。
For a long time, the petroleum industrial organization has been lower in efficiency, the result of lacking in market structure of oligopoly.
这种寡占型市场结构是一种松散型寡占结构，有利于保持适度的技术创新速度。
The oligopolistic market structure is loose and it, could keep an appropriate speed of technological innovation.
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