STANFORD UNIVERSITY MEDICAL CENTER STANFORD, CALIFORNIA 94305 ยข (415) 321-1200 STANFORD UNIVERSITY SCHOOL OF MEDICINE D f Geneti penboheiasni ie Lederberg OCT 6 1970 vear Prof. Lefcoe-- tnank you for your letter and your comment. Your point, well-taken, teaciies me how difficult it is to achieve perfect justice. I would also want to think more critically about the social costs of applying or not applying a betterment tax, including all the side-effects of inciting efforts to "beat the system" when a tax hecomes very riforous. Twill also call your remark to Congressman ticCloskey's attention, as well as James Gillies' piece, which I am sure can be readily located. Sincerely,