JEL Classification System
介绍了JEL分类系统，用于对经济学及相关学科（如政治学、法学）的书籍、论文等进行分类，并说明其使用格式和免费获取途径。
The categories listed below are used to classify books, book reviews, journal articles, and dissertations indexed in JEL, JEL on CD, EconLit, and www.e-JEL.org . New changes to the classification system appear as soon as possible on www.econlit.org . The JEL classification system may be used freely for scholarly purposes. We suggest the following format: “