You are in essence asserting that a particular theory, a particular model of how the world works, is true. In the case of the NAIRU, at least, that assertion is based on reasonably solid grounds.
Five of the largest banks account for the greater share of the banking sector assets of R2860.5 billion as at May 2008, a pattern which has been consistent over time. The salient features of this banking sector are summarised in Tables 1 and 2. This outcome may be viewed in contrast to the situation described by Dr A.J.