Fig. 4From: Shock and awe or incentive-compatible harm reduction? Graphic health warnings on tobacco packagesEvent study, sales outcome, Canada and the US. Notes: Coefficients are displayed for 1995–1997, 1998 and 1999 (pre-policy) and for 2001–2005 (post- policy), relative to the excluded year of 2000 just prior to the year of policy implementation. Vertical bars around each point estimate represent the 95% confidence intervalsBack to article page