經濟學系講座: 慶祝澳門大學45周年校慶 ── The Core of Shapley-Scarf Markets with Full Preferences
講者：張軍教授/南京審計大學社會與經濟研究院教授
日期：2/4/2026 (四)
時間：14:00-15:15
地點：E21B-G002
語言：英語
內容： We examine core concepts in the classical model of Shapley and Scarf (1974) under full preferences. Among the standard concepts, the strong core may be empty, whereas the nonempty weak core may be overly large and contain inefficient elements. Our main findings are: (1) The exclusion core of Balbuzanov and Kotowski (2019), a recent concept outperforming standard concepts in complex environments under strict preferences, can also be empty, yet it is more often nonempty than the strong core. (2) We introduce two new core concepts, respectively built on the exclusion core and the strong core. Both are nonempty and Pareto efficient, and coincide with the strong core whenever it is nonempty. (3) These core concepts are ordered by set inclusion, with the strong core as the smallest and the weak core as the largest.
