2004年,美国收购与兼并达到7770亿美元,比2003年上升了15%,欧洲收购兼并达到6620亿美元,同比增长7%。今年以来,这个收购兼并的上升趋势还在保持。对于公司并购,经济学家用协同效应理论来解释。所谓协同效应,是指两个公司兼并后,其产出比兼并前两个公司产出之和还要大,这一效应常被称为“2+2=5”的命 In 2004, U.S. acquisitions and mergers reached $ 777 billion, an increase of 15% over 2003, and European mergers and acquisitions reached $ 662 billion, an increase of 7% over the same period of last year. This year, the upward trend of mergers and acquisitions is still maintained. For corporate mergers and acquisitions, economists use the theory of synergy to explain. The so-called synergies, refers to the two companies after the merger, the output of the merger than the two companies before the output is even greater, this effect is often referred to as “2 +2 = 5” life