This year's Nobel prize in economics goes to Elinor Ostrom and Oliver E. Williamson (link). Elinor Ostrom received the prize for her analysis of economic governance, especially the commons while Oliver E. Williamson received the prize for his contributions to the economic governance, emphasizing the boundaries of the firm and its role in conflict resolution and case bargaining.
Michael Spence, the 2001 Nobel prize winner, briefly summarized (link) the main contributions of Elinor Ostrom and Oliver E. Williamson to the economic theory.