According to the firm's research, over 80% of senior executives involved believed that the deal they have been involved in had increased value for shareholders.
However, analysis had shown that 83% of mergers worldwide failed to produce any benefits for shareholders and over half actually destroyed value.
KPMG claims this is the first time that research had been used as an objective benchmarking measure to measure merger success as defined by increased shareholder value.
It pointed out that boardroom confidence in mergers and acquisitions as a driver for growth has never been higher with an annual global value for such transations estimated at £2.2trillion.
The survey also found that for a mergers and acquisitions to be successful there needed to be commonality of mother tongue and experience of such transations.
KPMG suffered some embarrassment following reports it had tried to withdraw the study after concerns that people might read a negative spin into it.
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