Modern institutional economics witnesses a merging of formal and informal strands of theorizing. This development has offered new and vigorous perspectives which avoid both arbitrariness and theoretical sterility. The essays on contract theory gathered here exemplify this development. They propone new results on central issues in contractual theorizing. The theory of the firm in its variegated aspects forms, naturally, the core of the present set of contributions. Issues of ownership, integration, delegation, and finan ce are analyzed. Some contributions use the theoretical approach of...