Entropy based rating

A rating system for rating entities of a group of entities, wherein the entities rate each other, at least in parts, the system comprising:

• a memory storing executable program portions;
• a processor which, when executing the program portions, instructs the following units and modules to execute their respective functions;
• a receiving unit configured to receive rating values from rating entities ui of the group for one or more other entities vj of the group of entities being rated, wherein a corresponding sequence indication of the rating is associated with each of the rating values;
• a storage unit adapted configured to store a matrix of combined rating values, wherein matrix element values Wij(ui,vj) of the matrix are indicative of received ratings;
• an entropy determination module configured to determine entropy values hi(ui) for each rating entity ui of the group of entities, wherein the entropy value hi(ui) is indicative of a rate an entity rates other entities with a same rating value;
• a goodness value determination module configured to determine goodness values gj(vj) for each entity vj, wherein each of the goodness values depends on a respective fairness value fi(ui) for each rating entity ui and a respective entropy value hi(ui) of each rating entity ui, wherein the goodness value are indicative of a quality metric of the entity vj of the group of entities;
• a fairness value determination module configured to determine the fairness values fi(ui) for each entity ui, wherein each fairness value is dependent on a corresponding goodness value gj(vj), wherein the fairness value is indicative of a difference between the goodness of a rated entity gj(vj) and a rating Wij(ui,vj) in the matrix given by ui;
• and
• a trigger unit configured to trigger the goodness value determination module and the fairness value determination module to respectively perform the goodness and fairness value determinations until a stop condition is met, resulting in consistent goodness values for rated entities and consistent fairness values of rating entities.

A computer program product for rating entities of a group of entities, wherein the entities rate each other, at least in parts, the computer program product comprising a non-transitory computer-readable storage medium having program instructions embodied therewith, wherein the program instructions are executable by one or more computing systems or controllers to cause the one or more computing systems or controllers to:

• receive rating values from the rating entities ui of the group of entities for one or more other entities vj of the group of entities being rated, wherein a corresponding sequence indication of the rating is associated with each of the rating values;
• build a matrix of combined rating values, wherein matrix element values Wj(ui,vj) of the matrix are indicative of the received ratings;
• determine entropy values hi(ui) for each rating entity ui, wherein the entropy value hi(ui) is indicative of a rate an entity rates other entities with a same rating value;
• determine goodness values gj(vj) for each entity vj of the group of entities, wherein each of the goodness values depends on a respective fairness value fi(ui) for each rating entity ui and a respective entropy value hi(ui) of each rating entity ui, wherein the goodness value are indicative of a quality metric of the entity vj of the group of entities;
• determine the fairness values fi(ui) for each entity ui, wherein each fairness value is dependent on a corresponding goodness value gj(vj), wherein the fairness value is indicative of a difference between the goodness of a rated entity gj(vj) and a rating Wij(ui,vj) in the matrix given by ui;
• and
• repeat the determination of the goodness and fairness values until a stop condition is met, resulting in consistent goodness values for the rated entities and consistent fairness values of the rating entities.