This research evaluated the technical efficiency of the banks before and after the merger. This research observed
15 banks which were involved in merger activities. This research used the Data Envelopment Analysis (DEA)
method with Variables of Returns to Scale (VRS) and input orientation. Analysis of Variance (ANOVA) was also
applied to test the difference between the technical efficiency in pre- and post-merger activities. This research
finds that only six banks are efficient after the merger. Furthermore, four banks have a better technical efficiency
than before, and five banks have lower technical efficiency after the merger.