Following the approach suggested by Favero and Rovelli (2002), I estimate a three-equations system for different sub-samples for Canada. The results indicate that the preferences of the monetary authority have changed between the different regimes. In particular, the parameter associated to the implicit target of inflation has been reduced significantly. The macroeconomic conditions from the side of the aggregate demand have been more favourable than those related to the aggregate supply. The SD of the monetary rule suggests that it has been conducted successfully in the last regime.