Market Specific Factors: Barriers to Entry and Exit

市场特定因素：进出壁垒

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ABSTRACT Barriers to entry and exit are an important part of the Theory of Industrial Organization.

进入及退出的壁垒是产业组织理论的重要内容。

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Firstly, market structure analysis is made on the degree of market concentration, produce difference and barriers to entry and exit of Pengzhou garlic industry.

主要从市场集中度、产品差别化和进入壁垒三个方面对大蒜产业的市场结构进行了分析，认为彭州大蒜产业是垄断竞争的市场。

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To keep our leaders honest we need to constantly challenge that power, work to break entrenched power cliques, and demolish barriers to entry and exit in our political system.

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