These differences have been documented recently by researchers at the Bank, but they are not well understood.
1 They appear to be systematic in nature, as opposed to chance occurrences, and Bank researchers suspect that they reflect differences in the way core inflation is defined, as well as structural differences in  1  Serious research at the Bank of Canada on alternative measures of core inflation began with the work of Laflèche (1997), Crawford et al. (1998), Hogan et al.