The Intergenerational Income Database (IID) is a database that links children and their parents using administrative tax data, allowing researchers and analysts to study intergenerational phenomena such as the transmission of earnings from parents to children, income mobility, etc. Thanks to the longitudinal structure of the database, the children can be followed into their mature adulthood.

The IID data is organized in two main modules: the family files and the individual files. At the core of the IID are the family files. The information on the Family File was retrieved from the Statistics Canada T1 Family File (T1FF). Children in the IID are grouped into “cohorts” according to their birth year. In this update, new 2006, 2011, and 2016 (Panel C) cohorts of children are included to the original six cohorts of children linked to their parents in 1982, 1984, and 1986 (Panel A) and 1991, 1996, and 2001 (Panel B). To be included in the IID, the children must be aged 16 to 19 in one of the cohort years, have valid social insurance numbers (SINs), and be residing with at least one of their parents. The earnings and income information of the children and parents also updated to cover the period from 1978 to 2019 for Panel A, from 1981 to 2019 for Panel B, and from 1989 to 2019 for Panel C.