Why does the
gender field in the cohort have a "prefer not to say" category for 2018 onward but not before? If this option wasn't available before, the category composition changed, making the disaggregated trends non-comparable. Should we note this as a definition change?Scale is off.
The Montréal series starts in 1998 while most others begin in 1995, which creates an apparent gap at the beginning of the comparison period. Rather than excluding early years, should we consider whether the Montréal definition was different in those years, or whether we're measuring something that simply didn't exist before the 1998 institutional reform?
That's pre-deduplication.