In this book of articles on day care, policy analyses of day care delivery are combined with recent research on the effects of day care. The authors include experimental psychologists, psychiatrists, economists, public health workers, pediatricians, and early childhood educators. Among the issues investigated are the influence of day care on parent-child attachment; the usefulness of psychoanalytic principles for the construction of quality day care programs; the developmental consequences of inconsistent caregiving for attachment behavior; the impact of verbal interaction on children's language acquisition and emotional adjustment; the influence of type of training on quality of day care; the validity and reliability of research studies of day care; the role of the federal government in day care regulation; sex, age, and temperament differences in children's responses to day care; cost effectiveness versus quality of day care; social policy options affecting delivery of quality day care; and profit versus non-profit day care. Child care tax credits are discussed as one policy option. Those families considered most likely to benefit from proposed policy options are analyzed and "Black perspective" on day care is presented. (Author/DB)