why are most Econ undergrad independent theses regression-heavy? most of what i see are papers that use regressions to show correlation between certain things, and few use game theory or math-intensive ideas to suggest an idea. 

why is this so? are most of these undergrad theses written by econ non-math major students? id want to do something involving game theory to learn how it would be to do it when i pursue a PhD. 

any comments that can guide me on this?