The surplus procedure (SP) is a fair division protocol for dividing goods in a way that achieves proportional equitability. It can be generalized to more than 2=two people and is strategyproof. For three or more people it is not always possible to achieve a division that is both equitable and envy-free.
The surplus procedure was devised by Steven J. Brams, Michael A. Jones, and Christian Klamler in 2006.
Criticisms of the paper
- Better Ways to Cut a Cake by Steven J. Brams, Michael A. Jones, and Christian Klamler in the Notices of the American Mathematical Society December 2006.
- Brams, Steven J.; Michael A. Jones; Christian Klamler (December 2006). "Better Ways to Cut a Cake" (PDF). Notices of the American Mathematical Society. 53 (11): 1314–1321. Retrieved 2008-01-16.
- Cutting Cakes Correctly by Theodore P. Hill, School of Mathematics, Georgia Institute of Technology, Atlanta, GA, 2008