Test-retest reliability assessments rarely investigate whether reliability itself is stable or whether change in reliability affects findings from substantive models. Research across the social sciences often recognises that measurement error could influence results, yet it rarely applies...

The Australian income tax and transfer system has undergone considerable reform since the mid 1980s. As a number of commentators have pointed out, one impact of reforms to cash transfers for families, as well as of some reforms to direct taxes, has been the evolution of a defacto system of...