TY - JOUR A1 - Costa, D.L. A1 - Kahn, M.E. T1 - Power couples: Changes in the location choice of the college educated, 1940-1990 Y1 - 2000 DO - 10.1162/003355300555079 JF - Quarterly Journal of Economics VL - 115 IS - 4 SP - 1287 EP - -1315 ER -