<p>I can’t really speak for other schools, but I know that at Georgetown both physics and economics departments are in the Georgetown College, so this wouldn’t require switching schools.</p>
<p>If you’re worried about not getting into an economics program because you have a lot of science ECs, I would tell you not to worry so much about this. Your ECs show focus already, a quality that is looked kindly upon in admissions no matter what the focus was. Also, economics employs a good deal of science and math, so your hard work will not be lost if you go into economics. There is also not a lot of opportunity for economics-related ECs at the high school level, at least less-so than science. I think you will be fine applying as Econ if that’s really what you want to do. (I’m fairly sure I’m going to do International Economics in Georgetown SFS, if you have any questions about that).</p>