my name is peter bach, and i am a physician at the memorial sloan-kettering cancer center. this is a hybrid of techniques from economics, epidemiology, and statistics in order to gain an idea about the health care system. for more than one ticket, but my main interest has been health disparities. i am grateful for the invitation to speak to you today about my research and others. i am humbled by this opportunity, and for more than one decade, the national institute of aging, and many others, and specifically credit my colleagues at sloan- kettering and those at the center for health change. we have for together on these problems. the names of their peer are less relevant. about one decade ago, my colleagues and i wondered if the higher mortality rates with cancer could be due to blacks receiving less affected treatment, specifically in the setting of cancer. we chose a simple procedure. this was for early stage lung cancer. the streets the no. 1 cancer killer, lung cancer, 25% of all cancer deaths, and it is enormously effective. in an analysis printed one decade ago, prior