Hello,

IIT JAM does conducts its entrance test  for only seven subjects namely Chemistry (CY), Physics (PH), Mathematics (MA), Geology (GG), Biological Sciences (BL), Mathematical Statistics (MS), Biotechnology (BT).

Evidently, Economics doesn't feature in the list regarding this.

For more details regarding this matter, you may consider going through the following link-

https://university.careers360.com/articles/jam-programmes