Yet it is so far from rigorous which makes it ripe for abuse. The "extreme" deviations are defined arbitrarily, evidenced by the fact that different offices of

Yet it is so far from rigorous which makes it ripe for abuse. The "extreme" deviations are defined arbitrarily, evidenced by the fact that different offices of the Fed come up with different inflation numbers. Hence the chairman can choose one which is conveniently on target.