I will shortly be entering my last two years of undergrad with majors in Mathematics and Economics, and minors in Physics and Finance. As an undergrad, I have taken the applied, algebra, and analysis tracks that are offered here at my school; so in other words, I have a strong background in mathematics. For my Economics degree, I will be taking the standard econometrics, math econ, and other various Junior/Senior level Econ classes. As obvious from my minors, I also have a background in the sciences and finance. As some bonus info, I speak Spanish, Russian, Chinese, and German; I am currently working with a professor in the Math department doing research; and I am a part of the Honor's Program at my school. What I am asking is this: what can I do in my final two years to create the strongest possible application for a Ph.D program in Economics? Any advice on coursework, extra activities, or anything at all would be appreciated. I am asking because my top three choices are Chicago, Stanford, and MIT, all of which are extremely competitive. Thanks for taking the time to read and respond!