Representing the first nationwide assessment of coeducational correctional institutions, a study was conducted to determine the current state-of-knowledge about corrections, drawing on reviews of the literature, a telephone survey of co-correctional institutions, in-depth site-visits, and iinterviews with practitioners. The data was discussed and analyzed in relationship to the following topics: characteristics of co-correctional institutions; co-correctional models; synthesized measurement model; available evaluation data; research indications; evaluation indications; and national policy and operations. The results indicated that coeducational correctional institutions may be effective in achieving certain programmatically beneficial effects, such as reduced institutional violece, improved atmosphere, and curbed post-release criminality. However, little formal evaluation has occurred, since reasons for involvement in co-corrections are related more to the accomplishment of system-level economic objectives than to the potential positive effects of the presence and interaction of male and female inmates housed in the same facility on institutional functioning or the inmates' lives. The study concluded by suggesting several topic areas for further research on co-corrections as as well as a number of operational guidelines for consideration by existing and emerging co-correctional institutions. (Author/BM)