摘要:This study is aimed at investigating the effect of Mergers &Acquisitions (M&As) upon banking sector efficiency in Pakistan. The widely used Data Envelopment Analysis method with its input oriented measure under CRS assumption is applied to explore the efficiency impact of M&As. The technical efficiency (TE), pure technical efficiency (PTE) and scale efficiency (SE) scores for the individual banks are calculated by using three different input-output models. The findings of study show a decline in average efficiency scores for majority of the sample banks during post-merger/acquisition period.