本文从市场理论的视角，对我国旅行社行业目前的市场集中度、产品差别化和进入退出壁垒和信息的对称度四个方面进行了分析。
From the perspective of the market, Chinas travel service industry focus on the current market concentration rate, product differentiation and barriers to access to and I.
第二，对主要作用于新建进入和关闭退出的市场壁垒进行了系统的分析。
Secondly, we studied the market barriers systematically which are now circumscribed to greenfield entry and closedown exit.
无论是新银行进入市场，还是在位银行退出市场，都面临着各种层层高筑的市场壁垒，产业结构优化受到严重限制。
Either the new getting in or the existent getting out of the market, there were various high market barriers that made the industry structure optimization to be confined.
我国职业篮球俱乐部进入和退出壁垒较多，俱乐部有一定的困难根据价格和需求情况进入或退出该行业，因此我国职业篮球俱乐部的供给弹性较小。
It is more barrier to enter and retreat from the basketball market for the professional basketball clubs, the elasticity of the professional basketball clubs is feeble.
进入与退出壁垒的研究是产业经济学的重要组成部分。
The research on the entry and exit barriers is an important part of industrial economics.
保险市场的进入与退出壁垒都会对市场效率产生较大影响。
Both entering and retreating the barriers will be greatly influential on the effective rate of the market.
进入及退出的壁垒是产业组织理论的重要内容。
ABSTRACT Barriers to entry and exit are an important part of the Theory of Industrial Organization.
分析了进入电力行业的发电和输配电市场的障碍和退出壁垒；
Finally, the electric market and the capability of the SEPC are analyzed.
分析了进入电力行业的发电和输配电市场的障碍和退出壁垒；
Finally, the electric market and the capability of the SEPC are analyzed.
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