<p>If you are a citizen of Canada, why not consider some universities in Canada, like University of Toronto, University of British Columbia, and McGill University?</p>
<p>If you are a citizen of the US living outside of the US, you may have more options in terms of financial aid and scholarships, though you would not have any state residency for in-state tuition at state universities.</p>
<p>If you feel that you must have another standardized test try, consider the ACT, since some students do better on the ACT than the SAT.</p>
<p>For math and economics, you may want to take a look at the course catalogs and see if the various schools have math-oriented economics courses (e.g. intermediate microeconomics and econometrics that have more math prerequisites than frosh calculus, or offerings of advanced mathematical economics).</p>
<p>University of Minnesota - Twin Cities is well respected for math and economics, and has a relatively low list price even for non-Minnesota residents. It is also not super-selective, although international undergraduates probably should not count on it as a safety.</p>