5. Discussion
The findings indicate that the ability of merging firms to transfer knowledge can explain a substantial portion of CBA success. Knowledge transfer remains a strong indicator of CBA success even after controlling for alternate factors affecting acquisition performance. The findings confirm the assumption made by several M&A researchers (for example, Ranft, 1997; Bresman et al., 1999) and offer strong support for the knowledgebased view of business performance. We also shed light on the effect of national cultural distance and organizational culture differences on knowledge transfer and CBA success. As argued by Teerikangas and Very (2006), prior research on M&As, with the exception of a few studies (Olie, 1994; Very, Lubatkin, Calori, & Veiga, 1997), has generally considered only one level of culture: either national or corporate, in contradiction with the current trend toward a multi-level view of culture in organizational and sociological research (Teerikangas & Very, 2006). Teerikangas and Very (2006) contended that the findings of earlier research studies differ depending on whether the object of examination was the effect of corporate (organizational) culture or of national cultural distance. The divergent findings indicate the importance of clearly differentiating the concepts of national cultural distance and organizational culture differences. In this paper we have examined national cultural distance and organizational culture differences separately. Our findings indicate that national cultural distance and organizational culture differences are dissimilar constructs because they are not significantly correlated (r = 0.054). Moreover, the relationship between knowledge transfer and national cultural distance and organizational cultural differences, and the effect of organizational culture differences and national cultural distance on CBA success varied considerably. National cultural distance showed no significant effect on knowledge transfer or CBA success, but organizational culture differences showed a significant impact on knowledge transfer and a strong effect on CBA success. The findings associated with organizational culture differences are consistent with prior findings by Larsson and Finkelstein (1999). Moreover, our results support the view of Weber et al. (1996, 2009) and Weber, Tarba, and Reichel (2011) that national cultural distance and organizational culture differences are dissimilar constructs that affect M&A success differently.