“…Second, we test for several confounders, such as parental education, marital status, employment, and gender, as well as child depressive affect, self-esteem, closeness to parents, grade point average (GPA), age, race/ethnicity, and gender. 1,2,11,15,17,19,[27][28][29][30][31][32][33] In addition, the single cohort reduces any confounding effects that may be attributable to differing ages of the parents at the various survey waves. Third, data collected directly from siblings allows a unique examination of the influence of older-sibling smoking, which has emerged as an important consideration in intergenerational research.…”