Release Message:  Low birth-weight children born to smoking mothers have a lower infant mortality rate than the low birth weight children of non-smokers. Authored by Allen J. Wilcox.

Description:  Low birth weight and mothers who smoke contribute to a higher mortality rate. Babies of smokers have lower average birth weight, but low birth weight babies born to smokers have a lower mortality rate than other low birth weight babies. (A special case of Simpson's paradox.)