2. Non-smoking: Respondents are assigned a value of 1 at each interview if they report not using tobacco products at all in the last 30 days.
3. Eating breakfast: The Add Health data do not provide consistent measures of breakfast eating habits across all waves; however, I link two measures of eating breakfast together by assigning a value of 1 if respondents eat breakfast at all, and a value of 0 otherwise. At wave I, respondents were asked, ‘‘What do you usually have for