Apr 18 Samuel Kortum, Yale University: "In Search of Trade Frictions" Share on Facebook Share on Twitter Share on LinkedIn Email Print The Frank D. Graham Memorial Lecture with Samuel Kortum, Yale University, on April 18, 2019 from 4:30-6:00 p.m in Julis Romo Rabinowitz A17. Date April 18, 2019 Time 4:30 p.m.