The Survey of Labour and Income Dynamics (SLID) has been a source of longitudinal data since 1993. Respondents are surveyed twice a year—once on labour and once on income—for six consecutive years. Each six-year period is called a panel, and new panels are begun every three years. Presently, longitudinal data are available from two complete panels, 1993 to 1998 and 1996 to 2001, which have been...