<p>Given Princeton’s independent work requirements, it would be next to impossible to complete the requirements for two different departments. Writing two senior theses in one year on top of regular coursework is entirely impractical. I know someone who designed his own concentration (which is possible but rare) in order to thoroughly cover two really different disciplines like philosophy and computer science, so that could be an option. But if Econ/Pol/WWS is your focus, you can probably get everything you want with a Woody Woo concentration that focuses heavily on economics and politics - maybe the political economy certificate might interest you as an addition. The WWS curriculum is extremely malleable and fits very well with the other social sciences.</p>