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Table 1 Number of observations

From: Exploring the intergenerational persistence of health behaviour: an empirical study of smoking from China

Data Number excluded Number remaining
CHNS 1991, 1993, 1997, 2000, 2004, 2006, 2009   94,812
Restrict to observations with age 13–18 89,871 4941
Exclude if smoking status is missing 408 4533
Exclude if mother or father’s age is missing 10 4523
Exclude if household income is missing 27 4496
Exclude if mother or father’s education is missing 128 4368