The mandatory long form census gave us better numbers in terms of specific groups of immigrants and how well they're doing in the labour market. When I talked about the research report “The Colour Coded Labour Market By The Numbers”, that was based on the voluntary national household survey. The concern of the researchers was that there's built-in bias, because we know that those who are at the lower economic status and at the higher economic status tend not to fill out surveys unless they are mandatory. It brings some question into who it is that we're missing geographically, but also particularly around issues of race and gender.
On March 26th, 2015. See this statement in context.