Many researchers, following Kenneth Arrow's lead, have concerned themselves with stating various desirable or undesirable criteria and attempting to classify vote-counting systems. This paper moves away from theoretical discussions: the authors illustrate and motivate a variety of alternatives...

While competition between firms producing substitutes is well understood, less is known about rivalry between complementors. We study the interaction between firms in markets with one-way essential complements. One good is essential to the use of the other but not vice versa, as arises with an...