The Canadian Census collects demographic data for specific groups such as$$ lone$-$parent families,$$ seniors, and those from specific language groups via what is commonly referred to as the$$ "Short Form." The Short Form questionnaire is issued to each household in$$ Canada, and all Canadian residents are legally required to complete the form. In addition to the$$ "Short Form," a more detailed$($long$)$ form, sent for completion to certain households$$ only, used to be$$ mandatory, but became voluntary instead at the time of the $2011$ census. What are the impacts of the change from mandatory to voluntary participation in the longer$$ census?