23 The slower response of CPI-common may reflect the fact that it is more heavily influenced by the prices of services. As noted earlier, the prices of services are, in turn, dependent on the evolution of wages. Because nominal wages are normally viewed as sticky downward, they are typically slower to respond to growing slack in the labour market and in the economy.
- 11 -  The two most recent episodes of a larger divergence are more challenging to explain. In 2012–13, CPI-trim eased from 1.5 per cent to roughly 1.0 per cent, while CPI-median and CPI-common have remained closer to 1.5 per cent. In the recent episode, CPI-common has been weakening more than the other two measures.