The firm is often considered as a nexus of contracts linking the manag
ement and its different stakeholders: claimholders, workers, unions, c
ustomers, suppliers, and the state, among others. This paper surveys r
ecent work in contract theory, the multiprincipal incentive theory, an
d the theory of side contracts, which provides some insights into the
structure of those contracts and therefore into the structure of the f
irm. First, we discuss the incomplete contracting assumptions underlyi
ng these variations of the usual grand contract approach. Second, we e
xplain how the theoretical lessons learned from this work-the distribu
tion of contracting rights, the power of incentive schemes within orga
nizations, and the design of communication channels-apply to the theor
y of the firm.