Over the last 10 years, dozens of Am Law firms have scrambled to find merger partners. New practice areas, geographic advantages, economies of scale-the rationales for these couplings are endless. But does all the happy talk really translate into bigger clients, busier associates and fatter pay packets?

5745b7b4-3ba5-420d-acbd-6525f07239d4To find out, we assessed the fortunes of eight firms from this year’s Am Law 100 that engaged in name-changing mergers with similarly sized partners in the past decade. We scrutinised their performances based on post-merger growth in revenue per lawyer (RPL), profits per partner and average compensation for all partners. Combinations with non-US firms were not included, nor were mergers with fewer than three years of post-merger results to analyse. As a benchmark, we looked at the average growth of The Am Law 100 by RPL, profits per partner and compensation-all partners. For firms where data was available, we also compared the growth of the merged firms with that of their predecessors.