He also acknowledged that hitting the zero lower bound has become more common, although it was a very rare event a few years ago (he appears to have referred to the aforementioned research results). These remarks give the impression that he does not exclude the idea of raising the inflation target if more research results point in this direction in the near future.
BIS central bankers’ speeches  9  the Bank’s framework was regarded as having limited credibility. My view is that the following three factors have contributed to the prevalence of such a perception. D–1.