I would recommend not using etc. in an academic paper. And if you do, please be sure you are using it correctly. See this good explanation about using etc. Here's an excerpt:
It isn’t that writing that contains et al. or etc. is bad writing, it’s just that it is completely possible to construct meaningful sentences without using them. In fact, in most cases, it is probably preferable not to use them since both are badly overused, and technically speaking, they have definite meanings and specific usages that often do not apply in the cases they are used. More specifically, etc. is NOT to be used to complete a clause that starts with such as or for example.
To use etcetera in a sentence is to imply that the the reader already knows the rest of the set it is referring to, not, as it is so often used, as a placeholder for an undefined set. (Note that etc. is fine to use when referring to an infinite set, which is, by definition, a known set.)
As an editor, I would almost always ask for a revision of a sentence that contains etc. It usually can be reworded more precisely and better without using this word. And quite honestly, many authors use it incorrectly.