I did a web search and found this information from the University of Pennsylvania. If you want more information, do your own web search. Here’s what they say:

“All upper level economics courses, including the intermediate theory courses (Economics 101 and 102) and Economics 103 assume familiarity with topics in multivariate calculus. For this reason, Math 104 and Math 114 (or 115) are prerequisites for these courses. Majors and prospective majors need to complete Math 104 prior to enrolling in Economics 101 or 102 AND have completed or be concurrently enrolled in Math 114 (or 115).

Students who have not satisfied the Math pre/corequisites for the intermediate and upper level economics courses will be dropped from registration during the first two weeks of the semester.”