Among the various institutional structures of an economy like the firm and the marketplace is one that is like no other. Science is unique. This uniqueness raises an important question: why does science exist? From an economic perspective, there are two potentially meaningful approaches to the existence of science. They both encompass institutional pluralism. A substitutes theory of comparative institutions presupposes the primacy of the commercial marketplace over firms—that firms substitute for the market when markets fail. This theory has not been used to explain the existence of science. A complements theory postulates that many simultaneous institutional responses, including science, are necessary for creating an efficient and equitable economy. The economic function of science is to produce fundamental theoretical abstractions about our world. Scientific theories are public goods that would not likely be produced within the governance structures of commercial markets and firms. The aim is to complement but not supplant traditional philosophical answers that science exists to discover truth and knowledge.
