We investigate the role that a voluntary corporate restructuring can play in the design of efficient internal corporate control mechanisms. To this end, we examine the postrestructuring internal control practices in 78 voluntary corporate spin-offs that were completed between 1972 and 1987. We find that the selection of the new CEOs, the design of their compensation contracts, and the staffing of the boards of directors and their compensation committees in the spun-off firms can be seen as ex ante eficient. These governance and control practices, however, are not strongly related to the observed positive market reactions to the spin-off announcements. The results indicate that equity reorganizations facilitate the implementation of efficient internal governance and control practices, but that other factors must influence the share price reactions to the announcement of such voluntary corporate restructurings.