 More recent theories depart from psychologism by introducing additional entities into the determination base of social entities. Kincaid 1986, for instance, claims that the social supervenes on individualistic properties and relations and actions. Other theories argue that among the constituents of the social are also resources and other features of the world. For instance, many microeconomic models include variables not only for attributes of individual people, but also for bundles of resources possessed by those people, or for such things as capital goods or geographic locations. Another example is Edith Penrose’s “resource theory” of the firm (Penrose 1959). Penrose proposes that firms (corporations, partnerships, etc.) be understood as collections of distinctive resources, including real estate, capital goods, and material processes.