Individual level |

Quit attempts | A dichotomous indicator equals 1 is the respondent has attempted to quit since the last wave, 0 otherwise |

Weight control belief=1 | A dichotomous indicator equals 1 is the respondent strongly agrees or agrees on the weight control effect of smoking in the last wave, 0 otherwise |

Age | Age at the survey year |

Married | A dichotomous indicator equals 1 is the respondent is married, 0 otherwise |

Employed | A dichotomous indicator equals 1 is the respondent is employed, 0 otherwise |

Education | Binary indicators for 3 categories: low, middle and high education (for the USA, Canada and Australia, these categories refer to high school or less, community college/technical school or some college, and college and above; for the UK, these categories refer to secondary school, some college, and college or above) |

Income | Binary indicators for 3 categories: low, middle and high income (for the USA, Canada and Australia, these categories refer to annual household income less than $30 000, $30 000–59 999 and $60 000 or above; for the UK, these categories refer to annual household income at £15 000 or lower, £15 001–30 000 and £30 001 or higher) |

Stratum level |

Price | Stratum-specific cigarette prices for a pack of 20 cigarettes in constant 2010 dollars, constructed using the median price reported in each stratum |

Worksite bans | The stratum level average of individuals’ exposure to smoking restrictions at work place (1 no restriction, 2 some restriction, 3 full restriction); possible range: 1–3 |

Bar bans | The stratum level average of individuals’ exposure to smoking restrictions at bars (1 no restriction, 2 some restriction, 3 full restriction); possible range: 1–3 |

Restaurant bans | The stratum level average of individuals’ exposure to smoking restrictions at restaurants (1 no restriction, 2 some restriction, 3 full restriction); possible range: 1–3 |

Antismoking messaging | Out of a number of antismoking broadcasting venues (TV, radio, etc), the fraction that each respondent was exposed to was calculated. These individual fractions were averaged to the stratum level and rescaled by multiplying by 10. Possible range: 1–10 |