Yearly Archives: 2011

Yves here. I normally let VoxEU articles stand on their own, but this topic, of whether the bank PR that bigger banks are essential stands up to scrutiny, is near and dear to my heart.

Note that the authors point to a 1990s study that finds that a $25 billion in assets bank was the optimal size. There were a fair number of studies done then of bank size versus efficiency. I’m a bit surprised that this is the one that is most often cited, since it also came up with the biggest size threshold at which a negative cost curve kicked in (meaning the bank became more costly to run). One study found that the slightly negative cost curve started at $100 million in assets (!); more typical was somewhere between $1 and $5 billion. And remember, these studies were done in the days when banks returned checks, and check processing was believed to have strong scale economies (ie, if check processing was a bigger proportion of total costs then than now, it could arguably have increased scale economies).

Some academics were frustrated with these results. I recall reading a paper where the author argued that there were theoretical cost savings to being bigger (duh) and basically contended that the empirical data had to be wrong.