上财经院经济学系的乔磊副教授与M. Ali Khan, Kali P. Rath, Yeneng Sun的合作论文“Modeling large societies: Why countable additivity is necessary”在经济理论领域国际顶尖期刊、我校经济学国际一类期刊Journal of Economic Theory上正式发表。
论文摘要
The economic literature with an atomless countably additive measure space to model the interaction of agents in a large society is enormous. However, there have been a number of attempts to relax the countable additivity assumption by working with a finitely (but non-countably) additive measure space (such as the set of natural numbers with a density charge). The main purpose of this paper is to demonstrate the necessity of countable additivity in modeling a large society in terms of the existence of equilibrium and its idealized limit property in both general equilibrium and game theory as illustrations. In addition, we point out that in the setting of atomless finitely additive agent spaces, even approximate equilibria may not exist in general, but do so only with additional assumptions.
乔磊副教授为我院2016年引进的“常任轨”（Tenure-track）教师，博士毕业于新加坡国立大学，主要研究领域为数理经济学，博弈论，曾入选2018年上海市教委“晨光计划”，并获2018年国家自然科学基金青年项目支持。
另外，乔磊副教授的另一篇合作论文Monte Carlo sampling processes and incentive compatible allocations in large economies（with Peter J. Hammond and Yeneng Sun）在近期被理论经济学一流期刊、我校认定的经济学国际二类期刊Economic Theory接受。
上海财经大学经济学院一直将科研创新能力视为学科核心竞争力的重要组成部分，学院教师科研团队以一流学科建设标准严格要求，积极探索、勇于创新，充分发挥学院持续推进的教育改革成果效益，坚定探索立足中国国情的国际化课题研究思路，持续推动前沿领域的问题研究，为学院的学科研究发展添砖加瓦。
（供稿、图：宋玥 编审：乔磊）