In this dissertation I reflect on business organizations, as ways to legally organize economic activities. In Chapter 1, I build on extant literature to define a theory of business organizations that is orthogonal and complementary to the theory of the firm. The central question this theory addresses is: What legal form should a firm take? I argue that the “property turn” that has characterized recent advancements in the theory of the firm has yet to fully take place in the theory of business organizations and attempt to make several steps in that direction. In particular, I show that a central issue for organizations is whether the capital provided by investors is committed for the long period or not. Different organizational forms are cha...