Rapid technological advances, globalization is leading to intensified global competition. In order to remain competitive and strengthen their market position, companies often opt for an external growth strategy through M&A. The most frequently mentioned reason for merging companies to achieve a synergistic effect. For this reason, it is essential that the buyer assesses the potential concentration in order to create value for shareholders. This paper focuses on analyses and characteristics and

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... efinition of synergy effect, analysis of main sources of synergy, definition of key variables in assessment of synergies.