This study uses structured observation categories to investigate the relationship between managerial behaviour, performance, and environmental and demographic variables. We found significant differences in managerial behaviour related to environmental and demographic variables but not to performance. Our replication and synthesis of other studies generally supports earlier conclusions regarding the brief, varied, fragmented and interpersonal nature of managerial work. The results also point to the important relationship between the environment and managerial behaviour. Implications for managerial practice and research are discussed. Copyright © 1990, Wiley Blackwell. All rights reserved