In the specialized literature, there exist few works comparing these techniques,
neither between OVO and OVA,nor between different aggregation strategies.
In [42] a study of OVO,OVA and Error Correcting Output Codes(ECOC) is carried out,but only
within multi-class Support Vector Machine (SVM) framework,
whereas in [52] an enumeration of the different existing binarization methodologies is presented, but also without comparing them mutually.
Furnkranz compared the suitability of OVO strategies for decision trees and decision lists with other
ensemble methods such as boosting and bagging, showing also the improvement of using confidence estimates in the combination of the outputs.
In a comparison in the framework of probability estimates is developed,but no more possible aggregations for the
outputs of the classifiers are considered.