Opting or Not Opting to Share Income Tax Information with the Census: Does It Affect Research Findings?

This paper examines the implication of the decision to give 2006 Census respondents the option of letting Statistics Canada access their income tax files rather than answering income-related questions directly. We find that giving respondents the option to share their income tax files (or not) adds a confounding factor when it comes to measuring family-income inequality, particularly for the bottom tail of the distribution. The consent decision does not, however, materially affect the estimation of standard wage equations.