Some kid from MIT tried to tell me that Economics was one of the Humanities. I like him now, but more importantly, that experience gave me the qualifications to comment here. Plus, I was a "Logic" class away from a Philosophy minor:
Congrats to you for obtaining some breadth in your education. I am all about people doing it now while they have the opportunity, because medical school probably won't afford you too many opportunities to expand your horizons (Yes, I know this is dependant on your attitude, but that's the default).
In all honesty, I am definitely glad that I majored in Econ, and then followed that with a secondary major in Biology (at least that is how BYU describes it on my transcript). However, I think that it barely made me a more competitive applicant. Oh, sure, it did a lot for my soul, and maybe that was reflected in my app, but it probably didn't do a ton for adcoms ont he first glance. Why? Because it isn't that much harder to get a bio degree after finishing all the pre-reqs that my schools recommends.
Seriously, it would have been hard for me to make that the topic of my essay, though I seriously love economics (I love to know the why's and how's of the FED pushing the discount rate up again). Sure, it was a good thing, but I sincerely feel that your GPA has a MUCH greater impact on your application than your major. Sure, if you are a 4.0/39S you may be looking for that extra little notch-on-the-belt that gets you into Harvard, but it won't make that much impact.
That said, if you have a serious and legitimate reason to do Poli-Sci as well (and this extends WAY beyond an "interest is policy") than it could serve you well, come interview time.
Good luck and thanks for reading the novel.
