[영문]This study compared the day-to-day activities and decisionmaking autonomy of the executive administrator in a diverse sample of 47 nursing homes. Few differences were found when comparing administrators' use of their time by ownership status or chain affiliation. However, administrators of nonprofit and freestanding facilities experienced significantly greater autonomy across a range of decisions as compared to their counterparts in chain and investor-owned facilities. Results demonstrated that chain affiliation and unionization of staff were more important predictors of administrator autonomy than ownership status. These findings highlight the interactive effects of ownership, system size and facility affiliation and the need to use multivariate analysis to provide a solid foundation for future organizational research and policy decisions.