Social choice theory critically assesses and rationally designs economic mechanisms for improving human well-being. Kotaro Suzumura—one of the world’s foremost thinkers in social choice theory and welfare economics—fuses abstract ideas with real-world economies to examine foundational...

Banerjee and Pattanaik (1996) proved a theorem that the maximal set with respect to a quasi-ordering can be fully recovered by defining the greatest sets with respect to each and every ordering extension thereof and taking their union. Donaldson and Weymark (1998) proved a theorem that a...

This paper establishes comparative statics results for an oligopoly model with strategic commitment. Firms compete in two stages. In the first stage, firms decide on strategic cost-reducing R&D investment, whereas they choose output in the second stage. Taking an excise tax/subsidy as a shift...