retrospectively reported measures of alcohol use onset, such as age at first intoxication and age onset of regular drinking, would provide important information about the utility of alternate measures that may be affected less than age at first drink by retrospective reporting bias. Finally, the approach taken here can be applied to reports of first tobacco and cannabis use, which, like age at first drink, are associated with problem use (Anthony and Petronis, 1995; Everett et al., 1999; Grant and Dawson, 1998; Hu et al., 2006; King and Chassin, 2007) and are subject to forward telescoping (Bailey et al., 1992; Engels et al., 1997; Johnson and Mott, 2001; Labouvie et al., 1997; Parra et al., 2003; Shillington and Clapp, 2000).
