 Replacing the current "non-accelerating inflation rate of unemployment" (NAIRU), the BER that results in stable inflation is called the "non-accelerating inflation buffer employment ratio" (NAIBER) (Mitchell 1998).It is a full employment steady state JG level, which is dependent on a range of factors including the path of the economy.There is an issue about the validity of an unchanging nominal anchor in an inflationary environment.