Spliddit's credit calculator fairly determines the contribution of each individual to a group project. Use cases include a teacher looking to monitor group assignments, a scientist looking to find a fair author ordering for a research paper, and a company looking to split bonuses among employees. You begin by providing a list of people who contributed to the project. We then send links to the contributors where they evaluate their peers. Our calculator uses these evaluations to settle on a fair assignment of credit.
Fairness Properties
Impartiality
Each participant's share of the credit depends only on other participants' reports. In other words, a participant cannot affect her own share of the credit.
This property is guaranteed.
Consensuality
If all participants agree on each other's relative contributions, then credit is shared according to a consensual division that is consistent with everyone's inputs.
This property is guaranteed.
Algorithm Overview
It's quite simple, actually: We just use a (carefully designed) formula. The outcome is guaranteed to satisfy impartiality and consensuality, together with several other desirable properties.
Reference: "Impartial Division of a Dollar", by Geoffroy de Clippel, Herve Moulin, and Nicolaus Tideman.