This collection of papers is edited by renowned business thinker Oliver Williamson, who is currently Transamerica Professor of Corporate Strategy at the School of Business Administration at Berkeley. The fiftieth anniversary of the publication of Chester I. Barnard's remarkable and stillinfluential book, The Functions of the Executive, was celebrated with a seminar series at the University of California, Berkeley in the Spring of 1988. Eight of those lectures are published here. The contributors include organization specialists and sociologists (Barbara Levitt and James March; W.Richard Scott; Glenn Carroll; Jeffrey Pfeffer), an anthropologist, a political scientist, and two economists (Mary Douglas; Terry Moe; Oliver Hart; Oliver Williamson). An important contribution to organization theory, this volume reports on recent progress in this field, and projects a productiveresearch future.