Zusammenfassung (übersetzt):
The paper presents the results of two surveys on how ownership structure and corporate governance affect corporate performance. The analyses focus on the question whether the differences among the performances of firms can be attributed to the various types of ownership structures and corporate governance practices. The concentrated ownership structure of Hungarian firms made it possible to set up groups of controlling owners. The owners were classified according to their foreign or domestic origin, and the groups were further divided according to the characteristics of ownership control. The results of the surveys reveal the differences in the control practices of the various ownership groups. These differences characterize market transactions and network contacts of the firms, as well as their management practices.