<p>Unfortunately it looks like you are required to have SAT subject tests in math and one natural science. Since MIT is such a math/science heavy school, this requirement makes sense. However, most other top schools will not require this (they will likely require some SAT subject tests but won’t specify which ones exactly).
MIT is obviously a very strong school for math but if you’re looking econ, it’s actually not a fabulous choice. Try Harvard, Penn, UChicago, etc. </p>
<p>In terms of scholarships/aid, it’s my understanding that MIT is not generous with aid to international students. Look in the international forum for threads regarding what colleges are generous for internationals. Generally the top Liberal Arts colleges (all good schools) tend to be generous with their aid.</p>