耶鲁大学公开课《博弈论》中，教授多次提到了“经济学115”，这是什么？

是耶鲁大学经济学课程编号，内容是微观经济学

ECON 115a or b, Introductory Microeconomics

An introduction to the basic tools of microeconomics to provide a rigorous framework for understanding how individuals, firms, markets, and governments allocate scarce resources. The design and evaluation of public policy.