I propose a mechanism for partisan sorting and geographic polarization which is tested using the mass migration of African-Americans from New Orleans to Houston, Texas in the aftermath of Hurricane Katrina. According to the Migration-Polarization (MP) Theory, diversity-increasing migration...

Can gender discrimination explain the limited growth of female election to the House of Representatives? Do female politicians lead to female voter empowerment? We answer these questions with a novel regression discontinuity design using close House primaries between 1982-2012. We find that...