A sample of mothers and daughters from the National Longitudinal Surveys of Labor Market Experience is examined to find out whether living in a one parent family has any effect on the chances of a daughter's completing high school. The sample is limited to mothers and daughters living in the same household during the initial sample screening in 1968. Three measures of family stability are given: the percentage of families ever headed by one parent; the percentage of families headed by one parent for at least two years; and the percentage of families headed by one parent at any time during the years when the daughter was aged 14 to 18. Average family income and number of siblings are also shown. Multiple regression analysis shows that failure to complete high school varies due to a number of factors, including length of time ever lived in a one parent family; level of family income during the high school years; educational level of mother; and knowledge of the world of work. It is found that low income is the single most significant factor in accounting for the probability of a daughter dropping out of high school, both for whites and blacks. (Author/MC)