What were the living standards of American slaves? According to Robert W. Fogel and Stanley Engerman in their monumental study, Time on the Cross, the material standard of living of slaves compared favorably with that of other nineteenth-century agricultural laborers. More recently, utilizing anthropometric data that allow them to construct ageheight profiles for slaves, economic historians have cast doubts upon this view as it applies to particular age cohorts. They question the validity of the earlier assessment of living standards as it applies to slave newborns, infants, and children.