适度的经济集中与生产规模，可以提高企业的生产效享，提高企业的市场竞争力，正基于此，世界各国企业兼并的浪潮方兴未艾，我国也一直有采取鼓励兼并及发展大企业集团的政策。但集中与效益并非总是成正比关系，达到一定的限度，即走向事物发展的反面。垄断的形成，使大企业失 Moderate economic concentration and scale of production can enhance the production efficiency of enterprises and enhance the market competitiveness of enterprises. Based on this, the wave of mergers and acquisitions in various countries in the world is on the rise. China has also adopted policies to encourage mergers and development and develop large enterprise groups. However, concentration and benefit are not always proportional to each other, reaching a certain limit, that is, going to the opposite of the development of things. The formation of monopoly, so that large enterprises lost