Second?degree dominance has become a widely accepted criterion for ordering distribution functions according to social welfare. However, it provides only partial ordering, and may fail rank distributions that intersect. To intersecting functions, we propose general approach based on rank?dependent theory. This avoids making arbitrary restrictions or parametric assumptions about welfare allows r...

Electoral systems are complex entities composed of a set of phases that form a process to which performance parameters can be associated. One of the key points of every electoral system is represented by the electoral formula that can be characterized by a wide spectrum of properties that, according to Arrow’s Impossibility Theorem and other theoretical results, cannot be all satisfied at the s...

Data Envelopment Analysis (DEA) technique now widely use for efficiency evaluation of a set of Decision Making Units (DMUs). As regards of the necessity for ranking efficient units different DEA models presented each of which has advantages and rank efficient units from special aspects. Note that all the existing ranking models have disadvantages, as well and there is not a model in which all t...