THE COPELAND METHOD .1. RELATIONSHIPS AND THE DICTIONARY

A central political and decision science issue is to understand how el ection outcomes can change with the choice of a procedure or the slate of candidates. These questions are answered for the important Copelan d method (CM) where, with a geometric approach, we characterize all re lationships among the rankings of positional voting methods and the CM . Then, we characterize all ways CM rankings can vary as candidates en ter or leave the election. In this manner new CM strengths and flaws a re detected.